Fix a bunch of future clippy warnings (#3586)

* Fix a bunch of future clippy warnings

* Fix a bunch of future clippy warnings

crates/nu-ansi-term/src/ansi.rs

@@ -320,7 +320,7 @@ impl fmt::Display for Infix {
                 let f: &mut dyn fmt::Write = f;
                 write!(f, "{}{}", RESET, self.1.prefix())
             }
-            Difference::NoDifference => {
+            Difference::Empty => {
                 Ok(()) // nothing to write
             }
         }

crates/nu-ansi-term/src/difference.rs

@@ -14,7 +14,7 @@ pub enum Difference {
 
     /// The before style is exactly the same as the after style, so no further
     /// control codes need to be printed.
-    NoDifference,
+    Empty,
 }
 
 impl Difference {
@@ -40,7 +40,7 @@ impl Difference {
         // it commented out for now, and defaulting to Reset.
 
         if first == next {
-            return NoDifference;
+            return Empty;
         }
 
         // Cannot un-bold, so must Reset.
@@ -153,10 +153,10 @@ mod test {
         };
     }
 
-    test!(nothing:    Green.normal(); Green.normal()  => NoDifference);
+    test!(nothing:    Green.normal(); Green.normal()  => Empty);
     test!(uppercase:  Green.normal(); Green.bold()    => ExtraStyles(style().bold()));
     test!(lowercase:  Green.bold();   Green.normal()  => Reset);
-    test!(nothing2:   Green.bold();   Green.bold()    => NoDifference);
+    test!(nothing2:   Green.bold();   Green.bold()    => Empty);
 
     test!(color_change: Red.normal(); Blue.normal() => ExtraStyles(Blue.normal()));
 

crates/nu-ansi-term/src/display.rs

@@ -266,7 +266,7 @@ where
             match Difference::between(&window[0].style, &window[1].style) {
                 ExtraStyles(style) => write!(w, "{}", style.prefix())?,
                 Reset => write!(w, "{}{}", RESET, window[1].style.prefix())?,
-                NoDifference => { /* Do nothing! */ }
+                Empty => { /* Do nothing! */ }
             }
 
             w.write_str(&window[1].string)?;

crates/nu-ansi-term/src/util.rs

@@ -43,7 +43,7 @@ pub fn unstyle(strs: &AnsiStrings) -> String {
     let mut s = String::new();
 
     for i in strs.0.iter() {
-        s += &i.deref();
+        s += i.deref();
     }
 
     s

crates/nu-cli/src/cli.rs

@@ -307,7 +307,7 @@ pub fn cli(context: EvaluationContext, options: Options) -> Result<(), Box<dyn E
         let mut initial_command = Some(String::new());
         let mut readline = Err(ReadlineError::Eof);
         while let Some(ref cmd) = initial_command {
-            readline = rl.readline_with_initial(&prompt, (&cmd, ""));
+            readline = rl.readline_with_initial(&prompt, (cmd, ""));
             initial_command = None;
         }
 
@@ -479,7 +479,7 @@ pub fn parse_and_eval(line: &str, ctx: &EvaluationContext) -> Result<String, She
 
     // TODO ensure the command whose examples we're testing is actually in the pipeline
     ctx.scope.enter_scope();
-    let (classified_block, err) = nu_parser::parse(&line, 0, &ctx.scope);
+    let (classified_block, err) = nu_parser::parse(line, 0, &ctx.scope);
     if let Some(err) = err {
         ctx.scope.exit_scope();
         return Err(err.into());

crates/nu-cli/src/completion/engine.rs

@@ -270,12 +270,11 @@ pub fn completion_location(line: &str, block: &Block, pos: usize) -> Vec<Complet
             }
             if line[start..pos].contains(BEFORE_COMMAND_CHARS) {
                 locations.push(LocationType::Command.spanned(Span::new(pos, pos)));
-                locations
             } else {
                 // TODO this should be able to be mapped to a command
                 locations.push(LocationType::Argument(command, None).spanned(Span::new(pos, pos)));
-                locations
             }
+            locations
         } else {
             // Cursor is before any possible completion location, so must be a command
             vec![LocationType::Command.spanned(Span::unknown())]

crates/nu-cli/src/shell/helper.rs

@@ -60,7 +60,7 @@ impl rustyline::completion::Completer for Helper {
 impl rustyline::hint::Hinter for Helper {
     type Hint = String;
     fn hint(&self, line: &str, pos: usize, ctx: &rustyline::Context<'_>) -> Option<String> {
-        self.hinter.as_ref().and_then(|h| h.hint(line, pos, &ctx))
+        self.hinter.as_ref().and_then(|h| h.hint(line, pos, ctx))
     }
 }
 
@@ -166,7 +166,7 @@ mod tests {
 
         let helper = Helper::new(EvaluationContext::basic(), None);
 
-        helper.update(&mut buffer, "cd ".len(), &replacement);
+        helper.update(&mut buffer, "cd ".len(), replacement);
 
         assert_eq!(
             buffer.as_str(),
@@ -186,7 +186,7 @@ mod tests {
 
         let helper = Helper::new(EvaluationContext::basic(), None);
 
-        helper.update(&mut buffer, "cd ".len(), &replacement);
+        helper.update(&mut buffer, "cd ".len(), replacement);
 
         assert_eq!(
             buffer.as_str(),

crates/nu-cli/src/types/deduction.rs

@@ -326,7 +326,7 @@ fn get_result_shape_of_math_expr(
     for expr in &[&bin.left, &bin.right] {
         let shape = match &expr.expr {
             Expression::Binary(deep_binary) => {
-                get_result_shape_of_math_expr(&deep_binary, (pipeline_idx, pipeline), scope)?
+                get_result_shape_of_math_expr(deep_binary, (pipeline_idx, pipeline), scope)?
             }
             _ => get_shape_of_expr(expr),
         };
@@ -537,19 +537,19 @@ impl VarSyntaxShapeDeductor {
             }
             Expression::Block(b) => {
                 trace!("Inferring vars in block");
-                self.infer_shape(&b, scope)?;
+                self.infer_shape(b, scope)?;
             }
             Expression::FullColumnPath(path) => {
                 trace!("Inferring vars in path");
                 match &path.head.expr {
                     //PathMember can't be var yet (?)
                     //TODO Iterate over path parts and find var when implemented
-                    Expression::Subexpression(b) => self.infer_shape(&b, scope)?,
+                    Expression::Subexpression(b) => self.infer_shape(b, scope)?,
                     Expression::Variable(var_name, span) => {
                         self.checked_insert(
                             &VarUsage::new(var_name, span),
                             VarShapeDeduction::from_usage_with_alternatives(
-                                &span,
+                                span,
                                 &get_shapes_allowed_in_path(),
                             ),
                         )?;
@@ -573,9 +573,9 @@ impl VarSyntaxShapeDeductor {
                 if let Some(range_right) = &range.right {
                     if let Expression::Variable(var_name, span) = &range_right.expr {
                         self.checked_insert(
-                            &VarUsage::new(&var_name, &spanned_expr.span),
+                            &VarUsage::new(var_name, &spanned_expr.span),
                             VarShapeDeduction::from_usage_with_alternatives(
-                                &span,
+                                span,
                                 &get_shapes_allowed_in_range(),
                             ),
                         )?;
@@ -745,7 +745,7 @@ impl VarSyntaxShapeDeductor {
                     let shapes = get_shapes_decay_able_to_bool();
                     // shapes.push(SyntaxShape::Math);
                     self.checked_insert(
-                        &var,
+                        var,
                         VarShapeDeduction::from_usage_with_alternatives(&var.span, &shapes),
                     )?;
                 }
@@ -765,7 +765,7 @@ impl VarSyntaxShapeDeductor {
                                 let shapes_in_list = self.get_shapes_in_list_or_insert_dependency(
                                     var,
                                     bin_spanned,
-                                    &list,
+                                    list,
                                     (pipeline_idx, pipeline),
                                 );
                                 match shapes_in_list {
@@ -879,7 +879,7 @@ impl VarSyntaxShapeDeductor {
                             var,
                             VarShapeDeduction::from_usage_with_alternatives(
                                 &var.span,
-                                &MULT_DIV_LOOKUP_TABLE
+                                MULT_DIV_LOOKUP_TABLE
                                     .get(&(op, var_side, shape))
                                     .expect("shape is unit, number or int. Would have failed in parsing stage otherwise")
                             ),
@@ -971,7 +971,7 @@ impl VarSyntaxShapeDeductor {
         let mut new_deductions = new_deductions;
         new_deductions.sort_unstable_by(|a, b| (a.deduction as i32).cmp(&(b.deduction as i32)));
 
-        let (insert_k, insert_v) = match self.inferences.get_key_value(&var_usage) {
+        let (insert_k, insert_v) = match self.inferences.get_key_value(var_usage) {
             Some((k, existing_deductions)) => {
                 let Deduction::VarShapeDeduction(existing_deductions) = existing_deductions;
 

crates/nu-command/src/commands/cal.rs

@@ -183,9 +183,9 @@ fn add_months_of_year_to_table(
         }
 
         let add_month_to_table_result = add_month_to_table(
-            &args,
+            args,
             &mut calendar_vec_deque,
-            &tag,
+            tag,
             selected_year,
             month_number,
             new_current_day_option,

crates/nu-command/src/commands/classified/external.rs

@@ -625,26 +625,26 @@ mod tests {
 
     #[test]
     fn checks_quotes_from_argument_to_be_passed_in() {
-        assert_eq!(argument_is_quoted(""), false);
+        assert!(!argument_is_quoted(""));
 
-        assert_eq!(argument_is_quoted("'"), false);
+        assert!(!argument_is_quoted("'"));
-        assert_eq!(argument_is_quoted("'a"), false);
+        assert!(!argument_is_quoted("'a"));
-        assert_eq!(argument_is_quoted("a"), false);
+        assert!(!argument_is_quoted("a"));
-        assert_eq!(argument_is_quoted("a'"), false);
+        assert!(!argument_is_quoted("a'"));
-        assert_eq!(argument_is_quoted("''"), true);
+        assert!(argument_is_quoted("''"));
 
-        assert_eq!(argument_is_quoted(r#"""#), false);
+        assert!(!argument_is_quoted(r#"""#));
-        assert_eq!(argument_is_quoted(r#""a"#), false);
+        assert!(!argument_is_quoted(r#""a"#));
-        assert_eq!(argument_is_quoted(r#"a"#), false);
+        assert!(!argument_is_quoted(r#"a"#));
-        assert_eq!(argument_is_quoted(r#"a""#), false);
+        assert!(!argument_is_quoted(r#"a""#));
-        assert_eq!(argument_is_quoted(r#""""#), true);
+        assert!(argument_is_quoted(r#""""#));
 
-        assert_eq!(argument_is_quoted("'andrés"), false);
+        assert!(!argument_is_quoted("'andrés"));
-        assert_eq!(argument_is_quoted("andrés'"), false);
+        assert!(!argument_is_quoted("andrés'"));
-        assert_eq!(argument_is_quoted(r#""andrés"#), false);
+        assert!(!argument_is_quoted(r#""andrés"#));
-        assert_eq!(argument_is_quoted(r#"andrés""#), false);
+        assert!(!argument_is_quoted(r#"andrés""#));
-        assert_eq!(argument_is_quoted("'andrés'"), true);
+        assert!(argument_is_quoted("'andrés'"));
-        assert_eq!(argument_is_quoted(r#""andrés""#), true);
+        assert!(argument_is_quoted(r#""andrés""#));
     }
 
     #[test]

crates/nu-command/src/commands/each/group.rs

@@ -73,7 +73,7 @@ impl Iterator for EachGroupIterator {
         let mut group = vec![];
         let mut current_count = 0;
 
-        while let Some(next) = self.input.next() {
+        for next in &mut self.input {
             group.push(next);
 
             current_count += 1;

crates/nu-command/src/commands/flatten.rs

@@ -85,7 +85,7 @@ fn flat_value(
                 } = value
                 {
                     if column_requested.is_none() && !columns.is_empty() {
-                        if out.contains_key(&column) {
+                        if out.contains_key(column) {
                             out.insert_value(format!("{}_{}", column, column), value.clone());
                         } else {
                             out.insert_value(column, value.clone());
@@ -141,7 +141,7 @@ fn flat_value(
                         }
                     } else if a_table.is_none() {
                         a_table = Some(TableInside::Entries(
-                            &column,
+                            column,
                             &value.tag,
                             value.table_entries().collect(),
                         ))

crates/nu-command/src/commands/format/command.rs

@@ -56,7 +56,7 @@ fn format_command(args: CommandArgs) -> Result<OutputStream, ShellError> {
             for command in &*commands {
                 match command {
                     FormatCommand::Text(s) => {
-                        output.push_str(&s);
+                        output.push_str(s);
                     }
                     FormatCommand::Column(c) => {
                         // FIXME: use the correct spans
@@ -97,7 +97,7 @@ fn format(input: &str) -> Vec<FormatCommand> {
     loop {
         let mut before = String::new();
 
-        while let Some(c) = loop_input.next() {
+        for c in &mut loop_input {
             if c == '{' {
                 break;
             }
@@ -110,7 +110,7 @@ fn format(input: &str) -> Vec<FormatCommand> {
         // Look for column as we're now at one
         let mut column = String::new();
 
-        while let Some(c) = loop_input.next() {
+        for c in &mut loop_input {
             if c == '}' {
                 break;
             }

crates/nu-command/src/commands/from_eml.rs

@@ -102,7 +102,7 @@ fn from_eml(args: CommandArgs) -> Result<OutputStream, ShellError> {
     }
 
     for HeaderField { name, value } in eml.headers.iter() {
-        dict.insert_untagged(name, headerfieldvalue_to_value(&tag, &value));
+        dict.insert_untagged(name, headerfieldvalue_to_value(&tag, value));
     }
 
     if let Some(body) = eml.body {

crates/nu-command/src/commands/from_xml.rs

@@ -60,7 +60,7 @@ fn from_node_to_value(n: &roxmltree::Node, tag: impl Into<Tag>) -> Value {
 
         let mut collected = TaggedDictBuilder::new(&tag);
 
-        let attribute_value: Value = from_attributes_to_value(&n.attributes(), &tag);
+        let attribute_value: Value = from_attributes_to_value(n.attributes(), &tag);
 
         let mut row = TaggedDictBuilder::new(&tag);
         row.insert_untagged(

crates/nu-command/src/commands/from_yaml.rs

@@ -99,7 +99,7 @@ fn convert_yaml_value_to_nu_value(
                             .first()
                             .and_then(|e| match e {
                                 (serde_yaml::Value::String(s), serde_yaml::Value::Null) => Some(
-                                    UntaggedValue::string("{{ ".to_owned() + &s + " }}")
+                                    UntaggedValue::string("{{ ".to_owned() + s + " }}")
                                         .into_value(tag),
                                 ),
                                 _ => None,

crates/nu-command/src/commands/get.rs

@@ -120,7 +120,7 @@ pub fn get_column_path(path: &ColumnPath, obj: &Value) -> Result<Value, ShellErr
             _ => {}
         }
 
-        if let Some(suggestions) = did_you_mean(&obj_source, column_path_tried.as_string()) {
+        if let Some(suggestions) = did_you_mean(obj_source, column_path_tried.as_string()) {
             ShellError::labeled_error(
                 "Unknown column",
                 format!("did you mean '{}'?", suggestions[0]),
@@ -146,7 +146,7 @@ pub fn get_column_path_from_table_error(
 
             let suggestions: IndexSet<_> = rows
                 .iter()
-                .filter_map(|r| did_you_mean(&r, column_path_tried.as_string()))
+                .filter_map(|r| did_you_mean(r, column_path_tried.as_string()))
                 .map(|s| s[0].to_owned())
                 .collect();
             let mut existing_columns: IndexSet<_> = IndexSet::default();
@@ -223,7 +223,7 @@ pub fn get_column_from_row_error(
         } => {
             let primary_label = format!("There isn't a column named '{}'", &column);
 
-            did_you_mean(&obj_source, column_path_tried.as_string()).map(|suggestions| {
+            did_you_mean(obj_source, column_path_tried.as_string()).map(|suggestions| {
                 ShellError::labeled_error_with_secondary(
                     "Unknown column",
                     primary_label,

crates/nu-command/src/commands/group_by.rs

@@ -241,16 +241,16 @@ pub fn group(
             let block = Box::new(move |_, row: &Value| {
                 match row.get_data_by_key(column_name.borrow_spanned()) {
                     Some(group_key) => Ok(as_string(&group_key)?),
-                    None => Err(suggestions(column_name.borrow_tagged(), &row)),
+                    None => Err(suggestions(column_name.borrow_tagged(), row)),
                 }
             });
 
-            nu_data::utils::group(&values, &Some(block), &name)
+            nu_data::utils::group(values, &Some(block), &name)
         }
         Grouper::ByColumn(None) => {
             let block = Box::new(move |_, row: &Value| as_string(row));
 
-            nu_data::utils::group(&values, &Some(block), &name)
+            nu_data::utils::group(values, &Some(block), &name)
         }
         Grouper::ByBlock => Err(ShellError::unimplemented(
             "Block not implemented: This should never happen.",

crates/nu-command/src/commands/group_by_date.rs

@@ -91,7 +91,7 @@ pub fn group_by_date(args: CommandArgs) -> Result<OutputStream, ShellError> {
                 let block = Box::new(move |_, row: &Value| {
                     let group_key = row
                         .get_data_by_key(column_name.borrow_spanned())
-                        .ok_or_else(|| suggestions(column_name.borrow_tagged(), &row));
+                        .ok_or_else(|| suggestions(column_name.borrow_tagged(), row));
 
                     group_key?.format("%Y-%m-%d")
                 });
@@ -107,7 +107,7 @@ pub fn group_by_date(args: CommandArgs) -> Result<OutputStream, ShellError> {
                 let block = Box::new(move |_, row: &Value| {
                     let group_key = row
                         .get_data_by_key(column_name.borrow_spanned())
-                        .ok_or_else(|| suggestions(column_name.borrow_tagged(), &row));
+                        .ok_or_else(|| suggestions(column_name.borrow_tagged(), row));
 
                     group_key?.format(&fmt)
                 });

crates/nu-command/src/commands/help.rs

@@ -48,7 +48,7 @@ fn help(args: CommandArgs) -> Result<ActionStream, ShellError> {
                 // Internal only commands shouldn't be displayed
                 .filter(|cmd_name| {
                     scope
-                        .get_command(&cmd_name)
+                        .get_command(cmd_name)
                         .filter(|command| !command.is_internal())
                         .is_some()
                 })
@@ -63,7 +63,7 @@ fn help(args: CommandArgs) -> Result<ActionStream, ShellError> {
             ) -> Result<(), ShellError> {
                 let document_tag = rest[0].tag.clone();
                 let value = command_dict(
-                    scope.get_command(&cmd_name).ok_or_else(|| {
+                    scope.get_command(cmd_name).ok_or_else(|| {
                         ShellError::labeled_error(
                             format!("Could not load {}", cmd_name),
                             "could not load command",

crates/nu-command/src/commands/histogram.rs

@@ -165,11 +165,9 @@ pub fn histogram(args: CommandArgs) -> Result<ActionStream, ShellError> {
             );
             fact.insert_untagged("percentage", UntaggedValue::string(fmt_percentage));
 
-            let string = std::iter::repeat("*")
+            let string = "*".repeat(percentage.as_u64().map_err(|_| {
-                .take(percentage.as_u64().map_err(|_| {
                 ShellError::labeled_error("expected a number", "expected a number", &name)
-                })? as usize)
+            })? as usize);
-                .collect::<String>();
 
             fact.insert_untagged(&frequency_column_name, UntaggedValue::string(string));
 
@@ -209,7 +207,7 @@ fn splitter(
                 )),
             }
         }),
-        None => Box::new(move |_, row: &Value| nu_value_ext::as_string(&row)),
+        None => Box::new(move |_, row: &Value| nu_value_ext::as_string(row)),
     }
 }
 

crates/nu-command/src/commands/if_.rs

@@ -101,7 +101,7 @@ fn if_command(raw_args: CommandArgs) -> Result<OutputStream, ShellError> {
     context.scope.add_vars(&condition.captured.entries);
 
     //FIXME: should we use the scope that's brought in as well?
-    let condition = evaluate_baseline_expr(&cond, &*context);
+    let condition = evaluate_baseline_expr(cond, &*context);
     match condition {
         Ok(condition) => match condition.as_bool() {
             Ok(b) => {

crates/nu-command/src/commands/let_.rs

@@ -98,7 +98,7 @@ pub fn letcmd(args: CommandArgs) -> Result<ActionStream, ShellError> {
     };
 
     ctx.scope.enter_scope();
-    let value = evaluate_baseline_expr(&expr, &ctx);
+    let value = evaluate_baseline_expr(expr, &ctx);
     ctx.scope.exit_scope();
 
     let value = value?;

crates/nu-command/src/commands/math/mode.rs

@@ -46,7 +46,7 @@ pub fn mode(values: &[Value], name: &Tag) -> Result<Value, ShellError> {
     let mut max_freq = -1;
     let mut modes = Vec::<Value>::new();
     for (value, frequency) in frequency_map.iter() {
-        match max_freq.cmp(&frequency) {
+        match max_freq.cmp(frequency) {
             Ordering::Less => {
                 max_freq = *frequency;
                 modes.clear();

crates/nu-command/src/commands/math/utils.rs

@@ -60,7 +60,7 @@ pub fn run_with_numerical_functions_on_stream(
 
 pub fn calculate(values: &[Value], name: &Tag, mf: MathFunction) -> Result<Value, ShellError> {
     if values.iter().all(|v| v.is_primitive()) {
-        mf(&values, &name)
+        mf(values, name)
     } else {
         // If we are not dealing with Primitives, then perhaps we are dealing with a table
         // Create a key for each column name
@@ -78,7 +78,7 @@ pub fn calculate(values: &[Value], name: &Tag, mf: MathFunction) -> Result<Value
         // The mathematical function operates over the columns of the table
         let mut column_totals = IndexMap::new();
         for (col_name, col_vals) in column_values {
-            if let Ok(out) = mf(&col_vals, &name) {
+            if let Ok(out) = mf(&col_vals, name) {
                 column_totals.insert(col_name, out);
             }
         }

crates/nu-command/src/commands/path/mod.rs

@@ -181,7 +181,7 @@ where
                 let cloned_args = Arc::clone(&args);
                 ret = match ret.swap_data_by_column_path(
                     path,
-                    Box::new(move |old| handle_value(&action, &old, span, cloned_args)),
+                    Box::new(move |old| handle_value(&action, old, span, cloned_args)),
                 ) {
                     Ok(v) => v,
                     Err(e) => Value::error(e),

crates/nu-command/src/commands/roll/column.rs

@@ -77,14 +77,12 @@ fn roll_by(value: Value, options: &Arguments) -> Option<Vec<Value>> {
     let direction = options.direction();
 
     if value.is_row() {
-        if options.move_headers() {
         let columns = value.data_descriptors();
-
+        if options.move_headers() {
             if let Some(fields) = rotate(columns, &options.by, direction) {
                 return Some(vec![select_fields(&value, &fields, &tag)]);
             }
         } else {
-            let columns = value.data_descriptors();
             let values_rotated = rotate(
                 value
                     .row_entries()

crates/nu-command/src/commands/run_external.rs

@@ -135,7 +135,7 @@ fn maybe_autocd_dir(cmd: &ExternalCommand, ctx: &mut EvaluationContext) -> Optio
         || (cmd.args.is_empty()
             && PathBuf::from(name).is_dir()
             && dunce::canonicalize(name).is_ok()
-            && !ctx.host.lock().is_external_cmd(&name))
+            && !ctx.host.lock().is_external_cmd(name))
     {
         Some(name)
     } else {

crates/nu-command/src/commands/select.rs

@@ -65,7 +65,7 @@ fn select(args: CommandArgs) -> Result<OutputStream, ShellError> {
         for path in &columns {
             let fetcher = get_data_by_column_path(
                 &value,
-                &path,
+                path,
                 move |obj_source, path_member_tried, error| {
                     if let PathMember {
                         unspanned: UnspannedPathMember::String(column),

crates/nu-command/src/commands/split_by.rs

@@ -71,16 +71,16 @@ pub fn split(
             let block = Box::new(move |_, row: &Value| {
                 match row.get_data_by_key(column_name.borrow_spanned()) {
                     Some(group_key) => Ok(as_string(&group_key)?),
-                    None => Err(suggestions(column_name.borrow_tagged(), &row)),
+                    None => Err(suggestions(column_name.borrow_tagged(), row)),
                 }
             });
 
-            nu_data::utils::split(&values, &Some(block), &name)
+            nu_data::utils::split(values, &Some(block), &name)
         }
         Grouper::ByColumn(None) => {
             let block = Box::new(move |_, row: &Value| as_string(row));
 
-            nu_data::utils::split(&values, &Some(block), &name)
+            nu_data::utils::split(values, &Some(block), &name)
         }
     }
 }

crates/nu-command/src/commands/str_/collect.rs

@@ -62,7 +62,7 @@ pub fn collect(args: CommandArgs) -> Result<ActionStream, ShellError> {
 
     match strings {
         Ok(strings) => {
-            let output = strings.join(&separator);
+            let output = strings.join(separator);
 
             Ok(ActionStream::one(ReturnSuccess::value(
                 UntaggedValue::string(output).into_value(tag),

crates/nu-command/src/commands/str_/ends_with.rs

@@ -114,7 +114,7 @@ mod tests {
         let pattern = ".toml";
         let expected = UntaggedValue::boolean(true).into_untagged_value();
 
-        let actual = action(&word, &pattern, Tag::unknown()).unwrap();
+        let actual = action(&word, pattern, Tag::unknown()).unwrap();
         assert_eq!(actual, expected);
     }
 
@@ -124,7 +124,7 @@ mod tests {
         let pattern = "Car";
         let expected = UntaggedValue::boolean(false).into_untagged_value();
 
-        let actual = action(&word, &pattern, Tag::unknown()).unwrap();
+        let actual = action(&word, pattern, Tag::unknown()).unwrap();
         assert_eq!(actual, expected);
     }
 }

crates/nu-command/src/commands/str_/find_replace.rs

@@ -101,7 +101,7 @@ fn action(
 ) -> Result<Value, ShellError> {
     match &input.value {
         UntaggedValue::Primitive(Primitive::String(s)) => {
-            let FindReplace(find, replacement) = FindReplace(&find, &replace);
+            let FindReplace(find, replacement) = FindReplace(find, replace);
             let regex = Regex::new(find);
 
             Ok(match regex {

crates/nu-command/src/commands/str_/index_of.rs

@@ -138,7 +138,7 @@ fn action(
         None => UntaggedValue::string("").into_value(&tag),
     };
 
-    let r = process_range(&input, &range)?;
+    let r = process_range(input, &range)?;
 
     match &input.value {
         UntaggedValue::Primitive(Primitive::String(s)) => {

crates/nu-command/src/commands/str_/starts_with.rs

@@ -114,7 +114,7 @@ mod tests {
         let pattern = "Car";
         let expected = UntaggedValue::boolean(true).into_untagged_value();
 
-        let actual = action(&word, &pattern, Tag::unknown()).unwrap();
+        let actual = action(&word, pattern, Tag::unknown()).unwrap();
         assert_eq!(actual, expected);
     }
 
@@ -124,7 +124,7 @@ mod tests {
         let pattern = ".toml";
         let expected = UntaggedValue::boolean(false).into_untagged_value();
 
-        let actual = action(&word, &pattern, Tag::unknown()).unwrap();
+        let actual = action(&word, pattern, Tag::unknown()).unwrap();
         assert_eq!(actual, expected);
     }
 }

crates/nu-command/src/commands/str_/trim/mod.rs

@@ -90,7 +90,7 @@ where
                         .map(|(k, v)| -> Result<_, ShellError> {
                             Ok((
                                 k.clone(),
-                                action(&v, tag.clone(), char_, trim_operation, mode)?,
+                                action(v, tag.clone(), char_, trim_operation, mode)?,
                             ))
                         })
                         .collect();

crates/nu-command/src/commands/table/command.rs

@@ -57,13 +57,7 @@ pub fn from_list(
         .into_iter()
         .map(|x| StyledString::new(x, header_style))
         .collect();
-    let entries = values_to_entries(
+    let entries = values_to_entries(values, &mut headers, configuration, starting_idx, color_hm);
-        values,
-        &mut headers,
-        &configuration,
-        starting_idx,
-        &color_hm,
-    );
     nu_table::Table {
         headers,
         data: entries,
@@ -96,11 +90,11 @@ fn values_to_entries(
                             ..
                         } => StyledString::new(
                             format_leaf(&UntaggedValue::nothing()).plain_string(100_000),
-                            style_leaf(&UntaggedValue::nothing(), &color_hm),
+                            style_leaf(&UntaggedValue::nothing(), color_hm),
                         ),
                         _ => StyledString::new(
                             format_leaf(value).plain_string(100_000),
-                            style_leaf(value, &color_hm),
+                            style_leaf(value, color_hm),
                         ),
                     }
                 } else {
@@ -113,12 +107,12 @@ fn values_to_entries(
 
                             StyledString::new(
                                 format_leaf(data.borrow()).plain_string(100_000),
-                                style_leaf(data.borrow(), &color_hm),
+                                style_leaf(data.borrow(), color_hm),
                             )
                         }
                         _ => StyledString::new(
                             format_leaf(&UntaggedValue::nothing()).plain_string(100_000),
-                            style_leaf(&UntaggedValue::nothing(), &color_hm),
+                            style_leaf(&UntaggedValue::nothing(), color_hm),
                         ),
                     }
                 }

crates/nu-command/src/commands/to_delimited_data.rs

@@ -23,7 +23,7 @@ fn from_value_to_delimited_string(
             for (k, v) in o.entries.iter() {
                 fields.push_back(k.clone());
 
-                values.push_back(to_string_tagged_value(&v)?);
+                values.push_back(to_string_tagged_value(v)?);
             }
 
             wtr.write_record(fields).expect("can not write.");
@@ -50,7 +50,7 @@ fn from_value_to_delimited_string(
                 .delimiter(separator as u8)
                 .from_writer(vec![]);
 
-            let merged_descriptors = merge_descriptors(&list);
+            let merged_descriptors = merge_descriptors(list);
 
             if merged_descriptors.is_empty() {
                 wtr.write_record(

crates/nu-command/src/commands/to_html.rs

@@ -285,18 +285,13 @@ fn to_html(args: CommandArgs) -> Result<OutputStream, ShellError> {
 
         output_string.push_str("\nScreenshots of themes can be found here:\n");
         output_string.push_str("https://github.com/mbadolato/iTerm2-Color-Schemes\n");
-
-        // Short circuit and return the output_string
-        Ok(OutputStream::one(
-            UntaggedValue::string(output_string).into_value(name_tag),
-        ))
     } else {
         let theme_tag = match &theme {
             Some(v) => &v.tag,
             None => &name_tag,
         };
 
-        let color_hm = get_theme_from_asset_file(dark, &theme, &theme_tag);
+        let color_hm = get_theme_from_asset_file(dark, &theme, theme_tag);
         let color_hm = match color_hm {
             Ok(c) => c,
             _ => {
@@ -362,12 +357,11 @@ fn to_html(args: CommandArgs) -> Result<OutputStream, ShellError> {
             setup_no_color_regexes(&mut regex_hm);
             output_string = run_regexes(&regex_hm, &output_string);
         }
-
+    }
     Ok(OutputStream::one(
         UntaggedValue::string(output_string).into_value(name_tag),
     ))
 }
-}
 
 fn html_list(list: Vec<Value>) -> String {
     let mut output_string = String::new();
@@ -393,7 +387,7 @@ fn html_table(table: Vec<Value>, headers: Vec<String>) -> String {
     output_string.push_str("<tr>");
     for header in &headers {
         output_string.push_str("<th>");
-        output_string.push_str(&htmlescape::encode_minimal(&header));
+        output_string.push_str(&htmlescape::encode_minimal(header));
         output_string.push_str("</th>");
     }
     output_string.push_str("</tr>");

crates/nu-command/src/commands/to_json.rs

@@ -189,9 +189,7 @@ fn to_json(args: CommandArgs) -> Result<OutputStream, ShellError> {
                                         serde_json_string.as_str(),
                                     )
                                 {
-                                    let indentation_string = std::iter::repeat(" ")
+                                    let indentation_string = " ".repeat(pretty_u64 as usize);
-                                        .take(pretty_u64 as usize)
-                                        .collect::<String>();
                                     let serde_formatter =
                                         serde_json::ser::PrettyFormatter::with_indent(
                                             indentation_string.as_bytes(),

crates/nu-command/src/commands/to_md.rs

@@ -117,7 +117,7 @@ fn process(
             })
             .collect::<String>()
     } else {
-        table(&input, pretty)
+        table(input, pretty)
     }
 }
 
@@ -158,7 +158,7 @@ fn collect_headers(headers: &[String]) -> (Vec<String>, Vec<usize>) {
 
     if !headers.is_empty() && (headers.len() > 1 || !headers[0].is_empty()) {
         for header in headers {
-            let escaped_header_string = htmlescape::encode_minimal(&header);
+            let escaped_header_string = htmlescape::encode_minimal(header);
             column_widths.push(escaped_header_string.len());
             escaped_headers.push(escaped_header_string);
         }
@@ -170,7 +170,7 @@ fn collect_headers(headers: &[String]) -> (Vec<String>, Vec<usize>) {
 }
 
 fn table(input: &[Value], pretty: bool) -> String {
-    let headers = nu_protocol::merge_descriptors(&input);
+    let headers = nu_protocol::merge_descriptors(input);
 
     let (escaped_headers, mut column_widths) = collect_headers(&headers);
 

crates/nu-command/src/commands/url_/mod.rs

@@ -51,7 +51,7 @@ where
                 for path in &paths {
                     ret = ret.swap_data_by_column_path(
                         path,
-                        Box::new(move |old| handle_value(&action, &old)),
+                        Box::new(move |old| handle_value(&action, old)),
                     )?;
                 }
 

crates/nu-command/src/commands/where_.rs

@@ -125,7 +125,7 @@ impl Iterator for WhereIterator {
     type Item = Value;
 
     fn next(&mut self) -> Option<Self::Item> {
-        while let Some(x) = self.input.next() {
+        for x in &mut self.input {
             self.context.scope.enter_scope();
             self.context.scope.add_vars(&self.block.captured.entries);
 

crates/nu-command/src/examples.rs

@@ -209,7 +209,7 @@ fn parse_line(line: &str, ctx: &EvaluationContext) -> Result<ClassifiedBlock, Sh
         line
     };
 
-    let (lite_result, err) = nu_parser::lex(&line, 0);
+    let (lite_result, err) = nu_parser::lex(line, 0);
     if let Some(err) = err {
         return Err(err.into());
     }

crates/nu-data/src/config/config_trust.rs

@@ -20,7 +20,7 @@ impl Trusted {
 }
 
 pub fn is_file_trusted(nu_env_file: &Path, content: &[u8]) -> Result<bool, ShellError> {
-    let contentdigest = Sha256::digest(&content).as_slice().to_vec();
+    let contentdigest = Sha256::digest(content).as_slice().to_vec();
     let nufile = std::fs::canonicalize(nu_env_file)?;
 
     let trusted = read_trusted()?;

crates/nu-data/src/config/local_config.rs

@@ -106,11 +106,11 @@ fn is_existent_local_cfg(cfg_file_path: &Path) -> Result<bool, ShellError> {
 
 fn is_trusted_local_cfg_content(cfg_file_path: &Path, content: &[u8]) -> Result<bool, ShellError> {
     //This checks whether user used `autoenv trust` to mark this cfg as secure
-    if !super::is_file_trusted(&cfg_file_path, &content)? {
+    if !super::is_file_trusted(cfg_file_path, content)? {
         //Notify user about present config, but not trusted
         Err(ShellError::untagged_runtime_error(
                 format!("{:?} is untrusted. Run 'autoenv trust {:?}' to trust it.\nThis needs to be done after each change to the file.",
-                    cfg_file_path, cfg_file_path.parent().unwrap_or_else(|| &Path::new("")))))
+                    cfg_file_path, cfg_file_path.parent().unwrap_or_else(|| Path::new("")))))
     } else {
         Ok(true)
     }

crates/nu-data/src/primitive.rs

@@ -113,7 +113,7 @@ pub fn string_to_lookup_value(str_prim: &str) -> String {
 fn update_hashmap(key: &str, val: &Value, hm: &mut HashMap<String, Style>) {
     if let Ok(var) = val.as_string() {
         let color = lookup_ansi_color_style(var);
-        let prim = string_to_lookup_value(&key);
+        let prim = string_to_lookup_value(key);
         if let Some(v) = hm.get_mut(&prim) {
             *v = color;
         } else {
@@ -157,64 +157,64 @@ pub fn get_color_config(config: &NuConfig) -> HashMap<String, Style> {
         for (key, value) in primitive_color_vars.row_entries() {
             match key.as_ref() {
                 "primitive_int" => {
-                    update_hashmap(&key, &value, &mut hm);
+                    update_hashmap(key, value, &mut hm);
                 }
                 "primitive_decimal" => {
-                    update_hashmap(&key, &value, &mut hm);
+                    update_hashmap(key, value, &mut hm);
                 }
                 "primitive_filesize" => {
-                    update_hashmap(&key, &value, &mut hm);
+                    update_hashmap(key, value, &mut hm);
                 }
                 "primitive_string" => {
-                    update_hashmap(&key, &value, &mut hm);
+                    update_hashmap(key, value, &mut hm);
                 }
                 "primitive_line" => {
-                    update_hashmap(&key, &value, &mut hm);
+                    update_hashmap(key, value, &mut hm);
                 }
                 "primitive_columnpath" => {
-                    update_hashmap(&key, &value, &mut hm);
+                    update_hashmap(key, value, &mut hm);
                 }
                 "primitive_pattern" => {
-                    update_hashmap(&key, &value, &mut hm);
+                    update_hashmap(key, value, &mut hm);
                 }
                 "primitive_boolean" => {
-                    update_hashmap(&key, &value, &mut hm);
+                    update_hashmap(key, value, &mut hm);
                 }
                 "primitive_date" => {
-                    update_hashmap(&key, &value, &mut hm);
+                    update_hashmap(key, value, &mut hm);
                 }
                 "primitive_duration" => {
-                    update_hashmap(&key, &value, &mut hm);
+                    update_hashmap(key, value, &mut hm);
                 }
                 "primitive_range" => {
-                    update_hashmap(&key, &value, &mut hm);
+                    update_hashmap(key, value, &mut hm);
                 }
                 "primitive_path" => {
-                    update_hashmap(&key, &value, &mut hm);
+                    update_hashmap(key, value, &mut hm);
                 }
                 "primitive_binary" => {
-                    update_hashmap(&key, &value, &mut hm);
+                    update_hashmap(key, value, &mut hm);
                 }
                 "separator_color" => {
-                    update_hashmap(&key, &value, &mut hm);
+                    update_hashmap(key, value, &mut hm);
                 }
                 "header_align" => {
-                    update_hashmap(&key, &value, &mut hm);
+                    update_hashmap(key, value, &mut hm);
                 }
                 "header_color" => {
-                    update_hashmap(&key, &value, &mut hm);
+                    update_hashmap(key, value, &mut hm);
                 }
                 "header_bold" => {
-                    update_hashmap(&key, &value, &mut hm);
+                    update_hashmap(key, value, &mut hm);
                 }
                 "header_style" => {
-                    update_hashmap(&key, &value, &mut hm);
+                    update_hashmap(key, value, &mut hm);
                 }
                 "index_color" => {
-                    update_hashmap(&key, &value, &mut hm);
+                    update_hashmap(key, value, &mut hm);
                 }
                 "leading_trailing_space_bg" => {
-                    update_hashmap(&key, &value, &mut hm);
+                    update_hashmap(key, value, &mut hm);
                 }
                 _ => (),
             }

crates/nu-data/src/utils/group.rs

@@ -16,9 +16,9 @@ pub fn group(
 
     for (idx, value) in values.table_entries().enumerate() {
         let group_key = if let Some(ref grouper) = grouper {
-            grouper(idx, &value)
+            grouper(idx, value)
         } else {
-            as_string(&value)
+            as_string(value)
         };
 
         let group = groups.entry(group_key?).or_insert(vec![]);

crates/nu-data/src/utils/internal.rs

@@ -51,7 +51,7 @@ fn formula(
     calculator: Box<dyn Fn(Vec<&Value>) -> Result<Value, ShellError> + Send + Sync + 'static>,
 ) -> Box<dyn Fn(&Value, Vec<&Value>) -> Result<Value, ShellError> + Send + Sync + 'static> {
     Box::new(move |acc, datax| -> Result<Value, ShellError> {
-        let result = match unsafe_compute_values(Operator::Multiply, &acc, &acc_begin) {
+        let result = match unsafe_compute_values(Operator::Multiply, acc, &acc_begin) {
             Ok(v) => v.into_untagged_value(),
             Err((left_type, right_type)) => {
                 return Err(ShellError::coerce_error(
@@ -164,7 +164,7 @@ pub fn sum(data: Vec<&Value>) -> Result<Value, ShellError> {
     for value in data {
         match value.value {
             UntaggedValue::Primitive(_) => {
-                acc = match unsafe_compute_values(Operator::Plus, &acc, &value) {
+                acc = match unsafe_compute_values(Operator::Plus, &acc, value) {
                     Ok(v) => v,
                     Err((left_type, right_type)) => {
                         return Err(ShellError::coerce_error(
@@ -314,8 +314,8 @@ pub fn percentages(
                     .filter_map(|s| {
                         let hundred = UntaggedValue::decimal_from_float(100.0, tag.span);
 
-                        match unsafe_compute_values(Operator::Divide, &hundred, &maxima) {
+                        match unsafe_compute_values(Operator::Divide, &hundred, maxima) {
-                            Ok(v) => match unsafe_compute_values(Operator::Multiply, &s, &v) {
+                            Ok(v) => match unsafe_compute_values(Operator::Multiply, s, &v) {
                                 Ok(v) => Some(v.into_untagged_value()),
                                 Err(_) => None,
                             },

crates/nu-data/src/utils/mod.rs

@@ -40,7 +40,7 @@ pub fn report(
 ) -> Result<Model, ShellError> {
     let tag = tag.into();
 
-    let grouped = group(&values, &options.grouper, &tag)?;
+    let grouped = group(values, &options.grouper, &tag)?;
     let splitted = split(&grouped, &options.splitter, &tag)?;
 
     let x = grouped
@@ -48,7 +48,7 @@ pub fn report(
         .map(|(key, _)| key.clone())
         .collect::<Vec<_>>();
 
-    let x = sort_columns(&x, &options.format)?;
+    let x = sort_columns(&x, options.format)?;
 
     let mut y = splitted
         .row_entries()

crates/nu-data/src/utils/split.rs

@@ -28,7 +28,7 @@ pub fn split(
             ));
         }
 
-        match group(&value, splitter, &tag) {
+        match group(value, splitter, &tag) {
             Ok(grouped) => {
                 for (split_label, subset) in grouped.row_entries() {
                     let s = splits

crates/nu-data/src/value.rs

@@ -590,7 +590,7 @@ pub fn style_leaf<'a>(
             let str_len = str.len();
             let paren_index = str.find('(').unwrap_or(str_len - 1);
             let prim_type = str[0..paren_index].to_string();
-            style_primitive(&prim_type, &color_hash_map)
+            style_primitive(&prim_type, color_hash_map)
         }
         _ => TextStyle::basic_left(),
     }

crates/nu-engine/src/evaluate/evaluator.rs

@@ -26,7 +26,7 @@ pub fn evaluate_baseline_expr(
     };
     let span = expr.span;
     match &expr.expr {
-        Expression::Literal(literal) => Ok(evaluate_literal(&literal, span)),
+        Expression::Literal(literal) => Ok(evaluate_literal(literal, span)),
         Expression::ExternalWord => Err(ShellError::argument_error(
             "Invalid external word".spanned(tag.span),
             ArgumentError::InvalidExternalWord,
@@ -35,7 +35,7 @@ pub fn evaluate_baseline_expr(
         Expression::Synthetic(hir::Synthetic::String(s)) => {
             Ok(UntaggedValue::string(s).into_untagged_value())
         }
-        Expression::Variable(var, s) => evaluate_reference(&var, ctx, *s),
+        Expression::Variable(var, s) => evaluate_reference(var, ctx, *s),
         Expression::Command => unimplemented!(),
         Expression::Subexpression(block) => evaluate_subexpression(block, ctx),
         Expression::ExternalCommand(_) => unimplemented!(),
@@ -68,13 +68,13 @@ pub fn evaluate_baseline_expr(
         }
         Expression::Range(range) => {
             let left = if let Some(left) = &range.left {
-                evaluate_baseline_expr(&left, ctx)?
+                evaluate_baseline_expr(left, ctx)?
             } else {
                 Value::nothing()
             };
 
             let right = if let Some(right) = &range.right {
-                evaluate_baseline_expr(&right, ctx)?
+                evaluate_baseline_expr(right, ctx)?
             } else {
                 Value::nothing()
             };
@@ -100,7 +100,7 @@ pub fn evaluate_baseline_expr(
             let mut output_headers = vec![];
 
             for expr in headers {
-                let val = evaluate_baseline_expr(&expr, ctx)?;
+                let val = evaluate_baseline_expr(expr, ctx)?;
 
                 let header = val.as_string()?;
                 output_headers.push(header);
@@ -128,7 +128,7 @@ pub fn evaluate_baseline_expr(
 
                 let mut row_output = IndexMap::new();
                 for cell in output_headers.iter().zip(row.iter()) {
-                    let val = evaluate_baseline_expr(&cell.1, ctx)?;
+                    let val = evaluate_baseline_expr(cell.1, ctx)?;
                     row_output.insert(cell.0.clone(), val);
                 }
                 output_table.push(UntaggedValue::row(row_output).into_value(tag.clone()));
@@ -140,7 +140,7 @@ pub fn evaluate_baseline_expr(
             let mut exprs = vec![];
 
             for expr in list {
-                let expr = evaluate_baseline_expr(&expr, ctx)?;
+                let expr = evaluate_baseline_expr(expr, ctx)?;
                 exprs.push(expr);
             }
 
@@ -228,7 +228,7 @@ fn evaluate_literal(literal: &hir::Literal, span: Span) -> Value {
                 UntaggedValue::decimal(d.clone()).into_value(span)
             }
         },
-        hir::Literal::Size(int, unit) => unit.compute(&int).into_value(span),
+        hir::Literal::Size(int, unit) => unit.compute(int).into_value(span),
         hir::Literal::String(string) => UntaggedValue::string(string).into_value(span),
         hir::Literal::GlobPattern(pattern) => UntaggedValue::glob_pattern(pattern).into_value(span),
         hir::Literal::Bare(bare) => UntaggedValue::string(bare.clone()).into_value(span),
@@ -287,7 +287,7 @@ fn evaluate_subexpression(
         None => InputStream::empty(),
     };
 
-    let result = run_block(&block, ctx, input, hir::ExternalRedirection::Stdout)?;
+    let result = run_block(block, ctx, input, hir::ExternalRedirection::Stdout)?;
 
     let output = result.into_vec();
 

crates/nu-engine/src/evaluate/operator.rs

@@ -84,7 +84,7 @@ fn table_contains(
         UntaggedValue::Table(values) => {
             Ok(values
                 .iter()
-                .any(|x| match compare_values(Operator::Equal, &left, &x.value) {
+                .any(|x| match compare_values(Operator::Equal, left, &x.value) {
                     Ok(coerced) => coerced,
                     _ => false,
                 }))

crates/nu-engine/src/evaluation_context.rs

@@ -292,7 +292,7 @@ impl EvaluationContext {
         }
 
         //Unload config
-        self.configs.lock().remove_cfg(&cfg_path);
+        self.configs.lock().remove_cfg(cfg_path);
         self.scope.exit_scope_with_tag(&tag);
     }
 
@@ -301,7 +301,7 @@ impl EvaluationContext {
     pub fn run_scripts(&self, scripts: Vec<String>, dir: Option<&Path>) {
         if let Some(dir) = dir {
             for script in scripts {
-                match script::run_script_in_dir(script.clone(), dir, &self) {
+                match script::run_script_in_dir(script.clone(), dir, self) {
                     Ok(_) => {}
                     Err(e) => {
                         let err = ShellError::untagged_runtime_error(format!(

crates/nu-engine/src/filesystem/dir_info.rs

@@ -105,9 +105,9 @@ impl DirInfo {
                     match f {
                         Ok(i) => match i.file_type() {
                             Ok(t) if t.is_dir() => {
-                                s = s.add_dir(i.path(), depth, &params, ctrl_c.clone())
+                                s = s.add_dir(i.path(), depth, params, ctrl_c.clone())
                             }
-                            Ok(_t) => s = s.add_file(i.path(), &params),
+                            Ok(_t) => s = s.add_file(i.path(), params),
                             Err(e) => s = s.add_error(e.into()),
                         },
                         Err(e) => s = s.add_error(e.into()),
@@ -134,7 +134,7 @@ impl DirInfo {
             }
         }
 
-        let d = DirInfo::new(path, &params, depth, ctrl_c);
+        let d = DirInfo::new(path, params, depth, ctrl_c);
         self.size += d.size;
         self.blocks += d.blocks;
         self.dirs.push(d);

crates/nu-engine/src/filesystem/filesystem_shell.rs

@@ -931,7 +931,7 @@ fn move_file(from: TaggedPathBuf, to: TaggedPathBuf) -> Result<(), ShellError> {
         to.push(from_file_name);
     }
 
-    move_item(&from, from_tag, &to)
+    move_item(from, from_tag, &to)
 }
 
 fn move_item(from: &Path, from_tag: &Tag, to: &Path) -> Result<(), ShellError> {

crates/nu-engine/src/filesystem/utils.rs

@@ -185,7 +185,7 @@ mod tests {
 
             let mut res = FileStructure::new();
 
-            res.walk_decorate(&dirs.test())
+            res.walk_decorate(dirs.test())
                 .expect("Can not decorate files traversal.");
 
             assert_eq!(

crates/nu-engine/src/maybe_text_codec.rs

@@ -40,7 +40,7 @@ impl<R: Read> Iterator for BufCodecReader<R> {
         let buffer = self.input.fill_buf();
         match buffer {
             Ok(s) => {
-                let result = self.maybe_text_codec.decode(&s).transpose();
+                let result = self.maybe_text_codec.decode(s).transpose();
 
                 let buffer_len = s.len();
                 self.input.consume(buffer_len);

crates/nu-engine/src/plugin/build_plugin.rs

@@ -158,7 +158,7 @@ pub fn scan(
 
                 if is_valid_name && is_executable {
                     trace!(target: "nu::load", "plugin infrastructure -> Trying {:?}", path.display());
-                    build_plugin_command(&path).unwrap_or(None)
+                    build_plugin_command(path).unwrap_or(None)
                 } else {
                     None
                 }

crates/nu-engine/src/plugin/run_plugin.rs

@@ -416,7 +416,7 @@ fn run_sink(path: String, args: CommandArgs) -> Result<ActionStream, ShellError>
                         "Bypass",
                         "-File",
                         &real_path.to_string_lossy(),
-                        &tmpfile
+                        tmpfile
                             .path()
                             .to_str()
                             .expect("Failed getting tmpfile path"),

crates/nu-engine/src/script.rs

@@ -65,7 +65,7 @@ pub fn process_script(
     } else {
         let line = chomp_newline(script_text);
 
-        let (block, err) = nu_parser::parse(&line, span_offset, &ctx.scope);
+        let (block, err) = nu_parser::parse(line, span_offset, &ctx.scope);
 
         debug!("{:#?}", block);
         //println!("{:#?}", pipeline);
@@ -111,7 +111,7 @@ pub fn process_script(
                     && args
                         .positional
                         .as_ref()
-                        .map(|ref v| v.len() == 1)
+                        .map(|v| v.len() == 1)
                         .unwrap_or(true)
                     && args
                         .named
@@ -120,7 +120,7 @@ pub fn process_script(
                         .unwrap_or(true)
                     && canonicalize(ctx.shell_manager.path(), name).is_ok()
                     && Path::new(&name).is_dir()
-                    && !ctx.host.lock().is_external_cmd(&name)
+                    && !ctx.host.lock().is_external_cmd(name)
                 {
                     let tag = Tag {
                         anchor: Some(AnchorLocation::Source(line.into())),
@@ -285,7 +285,7 @@ pub fn run_script_standalone(
                 }
             };
 
-            maybe_print_errors(&context, Text::from(line));
+            maybe_print_errors(context, Text::from(line));
             if error_code != 0 && exit_on_error {
                 std::process::exit(error_code);
             }
@@ -297,7 +297,7 @@ pub fn run_script_standalone(
                 .lock()
                 .print_err(err, &Text::from(line.clone()));
 
-            maybe_print_errors(&context, Text::from(line));
+            maybe_print_errors(context, Text::from(line));
             if exit_on_error {
                 std::process::exit(1);
             }

crates/nu-engine/src/shell/painter.rs

@@ -72,10 +72,8 @@ impl Painter {
 
                     current_style = self.styles[idx_end];
                     idx_start = idx_end;
-                    idx_end += 1;
-                } else {
-                    idx_end += 1;
                 }
+                idx_end += 1;
             }
 
             let intermediate = String::from_utf8_lossy(&self.original[idx_start..idx_end]);

crates/nu-parser/src/flag.rs

@@ -94,7 +94,7 @@ mod tests {
     #[test]
     fn parses_longform_flag_containing_equal_sign() {
         let input = "bundle add rails --group=development";
-        let (tokens, _) = lex(&input, 0);
+        let (tokens, _) = lex(input, 0);
         let (root_node, _) = parse_block(tokens);
 
         assert_eq!(root_node.block.len(), 1);

crates/nu-parser/src/parse.rs

@@ -537,7 +537,7 @@ fn parse_dollar_expr(
             && lite_arg.item.ends_with('\''))
     {
         // This is an interpolated string
-        parse_interpolated_string(&lite_arg, scope)
+        parse_interpolated_string(lite_arg, scope)
     } else if let (expr, None) = parse_range(lite_arg, scope) {
         (expr, None)
     } else if let (expr, None) = parse_full_column_path(lite_arg, scope) {
@@ -588,7 +588,7 @@ fn format(input: &str, start: usize) -> (Vec<FormatCommand>, Option<ParseError>)
         let mut found_end = false;
         let mut delimiter_stack = vec![')'];
 
-        while let Some(c) = loop_input.next() {
+        for c in &mut loop_input {
             end += 1;
             if let Some('\'') = delimiter_stack.last() {
                 if c == '\'' {
@@ -726,9 +726,9 @@ fn parse_external_arg(
     scope: &dyn ParserScope,
 ) -> (SpannedExpression, Option<ParseError>) {
     if lite_arg.item.starts_with('$') {
-        parse_dollar_expr(&lite_arg, scope)
+        parse_dollar_expr(lite_arg, scope)
     } else if lite_arg.item.starts_with('(') {
-        parse_subexpression(&lite_arg, scope)
+        parse_subexpression(lite_arg, scope)
     } else {
         (
             SpannedExpression::new(Expression::string(lite_arg.item.clone()), lite_arg.span),
@@ -809,7 +809,7 @@ fn parse_table(
     let lite_cells = &lite_rows.commands[0];
 
     for arg in &lite_cells.parts {
-        let (string, err) = verify_and_strip(&arg, '[', ']');
+        let (string, err) = verify_and_strip(arg, '[', ']');
         if error.is_none() {
             error = err;
         }
@@ -891,12 +891,12 @@ fn parse_arg(
     lite_arg: &Spanned<String>,
 ) -> (SpannedExpression, Option<ParseError>) {
     if lite_arg.item.starts_with('$') {
-        return parse_dollar_expr(&lite_arg, scope);
+        return parse_dollar_expr(lite_arg, scope);
     }
 
     // before anything else, try to see if this is a number in paranthesis
     if lite_arg.item.starts_with('(') {
-        return parse_full_column_path(&lite_arg, scope);
+        return parse_full_column_path(lite_arg, scope);
     }
 
     match expected_type {
@@ -954,13 +954,13 @@ fn parse_arg(
             )
         }
 
-        SyntaxShape::Range => parse_range(&lite_arg, scope),
+        SyntaxShape::Range => parse_range(lite_arg, scope),
         SyntaxShape::Operator => (
             garbage(lite_arg.span),
             Some(ParseError::mismatch("operator", lite_arg.clone())),
         ),
-        SyntaxShape::Filesize => parse_filesize(&lite_arg),
+        SyntaxShape::Filesize => parse_filesize(lite_arg),
-        SyntaxShape::Duration => parse_duration(&lite_arg),
+        SyntaxShape::Duration => parse_duration(lite_arg),
         SyntaxShape::FilePath => {
             let trimmed = trim_quotes(&lite_arg.item);
             let expanded = expand_path(&trimmed).to_string();
@@ -1084,7 +1084,7 @@ fn parse_arg(
                         // We've found a parameter list
                         let mut param_tokens = vec![];
                         let mut token_iter = tokens.into_iter().skip(1);
-                        while let Some(token) = token_iter.next() {
+                        for token in &mut token_iter {
                             if matches!(
                                 token,
                                 Token {
@@ -1478,7 +1478,7 @@ fn parse_internal_command(
     );
 
     let mut internal_command = InternalCommand::new(name, name_span, lite_cmd.span());
-    internal_command.args.set_initial_flags(&signature);
+    internal_command.args.set_initial_flags(signature);
 
     let mut current_positional = 0;
     let mut named = NamedArguments::new();
@@ -1489,7 +1489,7 @@ fn parse_internal_command(
     while idx < lite_cmd.parts.len() {
         if lite_cmd.parts[idx].item.starts_with('-') && lite_cmd.parts[idx].item.len() > 1 {
             let (named_types, err) = super::flag::get_flag_signature_spec(
-                &signature,
+                signature,
                 &internal_command,
                 &lite_cmd.parts[idx],
             );

crates/nu-parser/src/shapes.rs

@@ -23,7 +23,7 @@ pub fn expression_to_flat_shape(e: &SpannedExpression) -> Vec<Spanned<FlatShape>
             }
             for row in cells {
                 for cell in row {
-                    output.append(&mut expression_to_flat_shape(&cell));
+                    output.append(&mut expression_to_flat_shape(cell));
                 }
             }
             output

crates/nu-plugin/src/test_helpers.rs

@@ -112,7 +112,7 @@ impl CallStub {
     }
 
     pub fn with_parameter(&mut self, name: &str) -> Result<&mut Self, ShellError> {
-        let cp = column_path(&name)
+        let cp = column_path(name)
             .as_column_path()
             .expect("Failed! Expected valid column path.");
         let cp = UntaggedValue::Primitive(Primitive::ColumnPath(cp.item)).into_value(cp.tag);

crates/nu-protocol/src/value.rs

@@ -536,12 +536,12 @@ impl Value {
 
     /// Returns an iterator of the values rows
     pub fn table_entries(&self) -> TableValueIter<'_> {
-        crate::value::iter::table_entries(&self)
+        crate::value::iter::table_entries(self)
     }
 
     /// Returns an iterator of the value's cells
     pub fn row_entries(&self) -> RowValueIter<'_> {
-        crate::value::iter::row_entries(&self)
+        crate::value::iter::row_entries(self)
     }
 
     /// Returns true if the value is empty

crates/nu-protocol/src/value/column_path.rs

@@ -78,7 +78,7 @@ impl ColumnPath {
                 span: _,
             },
             _,
-        ) = parse(&text)
+        ) = parse(text)
         {
             ColumnPath {
                 members: path.iter().map(|member| member.to_path_member()).collect(),

crates/nu-stream/src/input.rs

@@ -43,7 +43,7 @@ impl InputStream {
 
     pub fn drain_vec(&mut self) -> Vec<Value> {
         let mut output = vec![];
-        while let Some(x) = self.values.next() {
+        for x in &mut self.values {
             output.push(x);
         }
         output

crates/nu-stream/src/output.rs

@@ -45,7 +45,7 @@ impl ActionStream {
     pub fn drain_vec(&mut self) -> Vec<ReturnValue> {
         let mut output = vec![];
 
-        while let Some(x) = self.values.next() {
+        for x in &mut self.values {
             output.push(x);
         }
 

crates/nu-table/src/table.rs

@@ -886,7 +886,7 @@ impl WrappedTable {
 
         if self.theme.print_top_border {
             output.push_str(
-                self.print_separator(SeparatorPosition::Top, &color_hm)
+                self.print_separator(SeparatorPosition::Top, color_hm)
                     .as_str(),
             );
         }
@@ -895,7 +895,7 @@ impl WrappedTable {
             || (self.headers.len() == 1 && self.headers[0].max_width == 0);
 
         if !self.headers.is_empty() && !skip_headers {
-            output.push_str(self.print_cell_contents(&self.headers, &color_hm).as_str());
+            output.push_str(self.print_cell_contents(&self.headers, color_hm).as_str());
         }
 
         let mut first_row = true;
@@ -904,7 +904,7 @@ impl WrappedTable {
             if !first_row {
                 if self.theme.separate_rows {
                     output.push_str(
-                        self.print_separator(SeparatorPosition::Middle, &color_hm)
+                        self.print_separator(SeparatorPosition::Middle, color_hm)
                             .as_str(),
                     )
                 }
@@ -913,18 +913,18 @@ impl WrappedTable {
 
                 if self.theme.separate_header && !self.headers.is_empty() && !skip_headers {
                     output.push_str(
-                        self.print_separator(SeparatorPosition::Middle, &color_hm)
+                        self.print_separator(SeparatorPosition::Middle, color_hm)
                             .as_str(),
                     );
                 }
             }
 
-            output.push_str(self.print_cell_contents(row, &color_hm).as_str());
+            output.push_str(self.print_cell_contents(row, color_hm).as_str());
         }
 
         if self.theme.print_bottom_border {
             output.push_str(
-                self.print_separator(SeparatorPosition::Bottom, &color_hm)
+                self.print_separator(SeparatorPosition::Bottom, color_hm)
                     .as_str(),
             );
         }
@@ -1073,12 +1073,12 @@ pub fn draw_table(table: &Table, termwidth: usize, color_hm: &HashMap<String, St
     let wrapped_table = wrap_cells(
         processed_table,
         max_column_width,
-        &color_hm,
+        color_hm,
         &re_leading,
         &re_trailing,
     );
 
-    wrapped_table.print_table(&color_hm)
+    wrapped_table.print_table(color_hm)
 }
 
 fn wrap_cells(
@@ -1111,9 +1111,9 @@ fn wrap_cells(
             let (mut lines, inner_max_width) = wrap(
                 max_column_width,
                 contents.into_iter(),
-                &color_hm,
+                color_hm,
-                &re_leading,
+                re_leading,
-                &re_trailing,
+                re_trailing,
             );
             wrapped.lines.append(&mut lines);
             if inner_max_width > wrapped.max_width {
@@ -1139,9 +1139,9 @@ fn wrap_cells(
                 let (mut lines, inner_max_width) = wrap(
                     max_column_width,
                     contents.into_iter(),
-                    &color_hm,
+                    color_hm,
-                    &re_leading,
+                    re_leading,
-                    &re_trailing,
+                    re_trailing,
                 );
                 wrapped.lines.append(&mut lines);
                 if inner_max_width > wrapped.max_width {

crates/nu-table/src/wrap.rs

@@ -165,7 +165,7 @@ pub fn wrap<'a>(
                     // If this is a really long single word, we need to split the word
                     if current_line.len() == 1 && current_width > cell_width {
                         max_width = cell_width;
-                        let sublines = split_word(cell_width, &current_line[0].subline);
+                        let sublines = split_word(cell_width, current_line[0].subline);
                         for subline in sublines {
                             let width = subline.width;
                             lines.push(Line {
@@ -200,7 +200,7 @@ pub fn wrap<'a>(
             None => {
                 if current_width > cell_width {
                     // We need to break up the last word
-                    let sublines = split_word(cell_width, &current_line[0].subline);
+                    let sublines = split_word(cell_width, current_line[0].subline);
                     for subline in sublines {
                         let width = subline.width;
                         lines.push(Line {
@@ -231,12 +231,11 @@ pub fn wrap<'a>(
             if !first {
                 current_line_width += 1 + subline.width;
                 current_line.push(' ');
-                current_line.push_str(subline.subline);
             } else {
                 first = false;
                 current_line_width = subline.width;
-                current_line.push_str(subline.subline);
             }
+            current_line.push_str(subline.subline);
         }
 
         if current_line_width > current_max {

crates/nu-test-support/src/playground/tests.rs

@@ -30,7 +30,7 @@ fn current_working_directory_in_sandbox_directory_created() {
         let original_cwd = dirs.test();
         nu.within("some_directory_within");
 
-        assert_eq!(path(&nu.cwd()), original_cwd.join("some_directory_within"));
+        assert_eq!(path(nu.cwd()), original_cwd.join("some_directory_within"));
     })
 }
 
@@ -42,6 +42,6 @@ fn current_working_directory_back_to_root_from_anywhere() {
         nu.within("some_directory_within");
         nu.back_to_playground();
 
-        assert_eq!(path(&nu.cwd()), *original_cwd);
+        assert_eq!(path(nu.cwd()), *original_cwd);
     })
 }

crates/nu-value-ext/src/lib.rs

@@ -242,7 +242,7 @@ where
 
         match value {
             Ok(v) => current = v.clone(),
-            Err(e) => return Err(get_error(&current, &p, e)),
+            Err(e) => return Err(get_error(&current, p, e)),
         }
     }
 
@@ -260,7 +260,7 @@ where
     let fields = path.clone();
 
     let to_replace =
-        get_data_by_column_path(&value, path, move |obj_source, column_path_tried, error| {
+        get_data_by_column_path(value, path, move |obj_source, column_path_tried, error| {
             let path_members_span = fields.maybe_span().unwrap_or_else(Span::unknown);
 
             match &obj_source.value {
@@ -274,7 +274,7 @@ where
                         let suggestions: IndexSet<_> = rows
                             .iter()
                             .filter_map(|r| {
-                                nu_protocol::did_you_mean(&r, column_path_tried.as_string())
+                                nu_protocol::did_you_mean(r, column_path_tried.as_string())
                             })
                             .map(|s| s[0].to_owned())
                             .collect();
@@ -345,7 +345,7 @@ where
                         let primary_label = format!("There isn't a column named '{}'", &column);
 
                         if let Some(suggestions) =
-                            nu_protocol::did_you_mean(&obj_source, column_path_tried.as_string())
+                            nu_protocol::did_you_mean(obj_source, column_path_tried.as_string())
                         {
                             return ShellError::labeled_error_with_secondary(
                                 "Unknown column",
@@ -380,7 +380,7 @@ where
             }
 
             if let Some(suggestions) =
-                nu_protocol::did_you_mean(&obj_source, column_path_tried.as_string())
+                nu_protocol::did_you_mean(obj_source, column_path_tried.as_string())
             {
                 return ShellError::labeled_error(
                     "Unknown column",
@@ -396,7 +396,7 @@ where
     let replacement = callback(&old_value)?;
 
     value
-        .replace_data_at_column_path(&path, replacement)
+        .replace_data_at_column_path(path, replacement)
         .ok_or_else(|| {
             ShellError::labeled_error("missing column-path", "missing column-path", value.tag.span)
         })
@@ -560,14 +560,14 @@ pub fn forgiving_insert_data_at_column_path(
             .get_data_by_column_path(&cp, Box::new(move |_, _, err| err))
             .is_ok()
         {
-            return insert_data_at_column_path(&value, &cp, candidate);
+            return insert_data_at_column_path(value, &cp, candidate);
         } else if let Some((last, front)) = cp.split_last() {
             let mut current: &mut Value = &mut original;
 
             for member in front {
                 let type_name = current.spanned_type_name();
 
-                current = get_mut_data_by_member(current, &member).ok_or_else(|| {
+                current = get_mut_data_by_member(current, member).ok_or_else(|| {
                     ShellError::missing_property(
                         member.plain_string(std::usize::MAX).spanned(member.span),
                         type_name,
@@ -575,7 +575,7 @@ pub fn forgiving_insert_data_at_column_path(
                 })?
             }
 
-            insert_data_at_member(current, &last, candidate)?;
+            insert_data_at_member(current, last, candidate)?;
 
             return Ok(original);
         } else {
@@ -585,7 +585,7 @@ pub fn forgiving_insert_data_at_column_path(
         }
     }
 
-    insert_data_at_column_path(&value, split_path, new_value)
+    insert_data_at_column_path(value, split_path, new_value)
 }
 
 pub fn insert_data_at_column_path(
@@ -601,7 +601,7 @@ pub fn insert_data_at_column_path(
         for member in front {
             let type_name = current.spanned_type_name();
 
-            current = get_mut_data_by_member(current, &member).ok_or_else(|| {
+            current = get_mut_data_by_member(current, member).ok_or_else(|| {
                 ShellError::missing_property(
                     member.plain_string(std::usize::MAX).spanned(member.span),
                     type_name,
@@ -609,7 +609,7 @@ pub fn insert_data_at_column_path(
             })?
         }
 
-        insert_data_at_member(current, &last, new_value)?;
+        insert_data_at_member(current, last, new_value)?;
 
         Ok(original)
     } else {
@@ -801,7 +801,7 @@ pub(crate) fn get_mut_data_by_member<'value>(
 ) -> Option<&'value mut Value> {
     match &mut value.value {
         UntaggedValue::Row(o) => match &name.unspanned {
-            UnspannedPathMember::String(string) => o.get_mut_data_by_key(&string),
+            UnspannedPathMember::String(string) => o.get_mut_data_by_key(string),
             UnspannedPathMember::Int(_) => None,
         },
         UntaggedValue::Table(l) => match &name.unspanned {
@@ -812,7 +812,7 @@ pub(crate) fn get_mut_data_by_member<'value>(
                         ..
                     } = item
                     {
-                        if let Some(v) = o.get_mut_data_by_key(&string) {
+                        if let Some(v) = o.get_mut_data_by_key(string) {
                             return Some(v);
                         }
                     }

crates/nu_plugin_binaryview/src/binaryview.rs

@@ -328,7 +328,7 @@ pub fn view_contents_interactive(
 
     let mut nes = neso::Nes::new(0.0);
     let rawkey = RawKey::new();
-    nes.load_rom(&buffer);
+    nes.load_rom(buffer);
 
     if let Some(ref sav_path) = sav_path {
         if let Ok(contents) = std::fs::read(sav_path) {

crates/nu_plugin_binaryview/src/nu/mod.rs

@@ -31,7 +31,7 @@ impl Plugin for BinaryView {
                 let low_res = call_info.args.has("lores");
                 let skip = call_info.args.get("skip");
                 let length = call_info.args.get("bytes");
-                let _ = view_binary(&b, value_anchor.as_ref(), low_res, skip, length);
+                let _ = view_binary(b, value_anchor.as_ref(), low_res, skip, length);
             }
         }
     }

crates/nu_plugin_chart/src/nu/bar.rs

@@ -60,7 +60,7 @@ impl SubCommand {
 }
 
 fn display(model: &Model) -> Result<(), Box<dyn Error>> {
-    let mut app = Bar::from_model(&model)?;
+    let mut app = Bar::from_model(model)?;
 
     enable_raw_mode()?;
 

crates/nu_plugin_chart/src/nu/line.rs

@@ -60,7 +60,7 @@ impl SubCommand {
 }
 
 fn display(model: &Model) -> Result<(), Box<dyn Error>> {
-    let mut app = Line::from_model(&model)?;
+    let mut app = Line::from_model(model)?;
 
     enable_raw_mode()?;
 

crates/nu_plugin_inc/src/inc.rs

@@ -31,7 +31,7 @@ impl Inc {
     fn apply(&self, input: &str) -> UntaggedValue {
         match &self.action {
             Some(Action::SemVerAction(act_on)) => {
-                let mut ver = match semver::Version::parse(&input) {
+                let mut ver = match semver::Version::parse(input) {
                     Ok(parsed_ver) => parsed_ver,
                     Err(_) => return UntaggedValue::string(input.to_string()),
                 };
@@ -80,7 +80,7 @@ impl Inc {
                 Ok(UntaggedValue::filesize(b + 1_u64).into_value(value.tag()))
             }
             UntaggedValue::Primitive(Primitive::String(ref s)) => {
-                Ok(self.apply(&s).into_value(value.tag()))
+                Ok(self.apply(s).into_value(value.tag()))
             }
             UntaggedValue::Table(values) => {
                 if values.len() == 1 {
@@ -100,9 +100,9 @@ impl Inc {
 
                     let replace_for = get_data_by_column_path(
                         &value,
-                        &f,
+                        f,
                         move |obj_source, column_path_tried, _| match did_you_mean(
-                            &obj_source,
+                            obj_source,
                             column_path_tried.as_string(),
                         ) {
                             Some(suggestions) => ShellError::labeled_error(
@@ -122,7 +122,7 @@ impl Inc {
                     let replacement = self.inc(got)?;
 
                     value
-                        .replace_data_at_column_path(&f, replacement.value.into_untagged_value())
+                        .replace_data_at_column_path(f, replacement.value.into_untagged_value())
                         .ok_or_else(|| {
                             ShellError::labeled_error(
                                 "inc could not find field to replace",

crates/nu_plugin_post/src/post.rs

@@ -91,7 +91,7 @@ pub async fn post_helper(
     let path_str = path.as_string()?;
 
     let (file_extension, contents, contents_tag) =
-        post(&path_str, &body, user, password, &headers, path_tag.clone()).await?;
+        post(&path_str, body, user, password, headers, path_tag.clone()).await?;
 
     let file_extension = if has_raw {
         None
@@ -456,7 +456,7 @@ fn json_list(input: &[Value]) -> Result<Vec<serde_json::Value>, ShellError> {
 fn get_headers(call_info: &CallInfo) -> Result<Vec<HeaderKind>, ShellError> {
     let mut headers = vec![];
 
-    match extract_header_value(&call_info, "content-type") {
+    match extract_header_value(call_info, "content-type") {
         Ok(h) => {
             if let Some(ct) = h {
                 headers.push(HeaderKind::ContentType(ct))
@@ -467,7 +467,7 @@ fn get_headers(call_info: &CallInfo) -> Result<Vec<HeaderKind>, ShellError> {
         }
     };
 
-    match extract_header_value(&call_info, "content-length") {
+    match extract_header_value(call_info, "content-length") {
         Ok(h) => {
             if let Some(cl) = h {
                 headers.push(HeaderKind::ContentLength(cl))

crates/nu_plugin_query_json/src/query_json.rs

@@ -137,7 +137,7 @@ mod tests {
     fn validate_string() {
         let json = r#"{ "name": { "first": "Tom", "last": "Anderson" }, "age": 37, "children": ["Sara", "Alex", "Jack"], "friends": [ { "first": "James", "last": "Murphy" }, { "first": "Roger", "last": "Craig" } ] }"#;
         let val = valid(json);
-        assert_eq!(val, true);
+        assert!(val);
     }
 
     #[test]

crates/nu_plugin_selector/src/nu/mod.rs

@@ -46,7 +46,7 @@ impl Plugin for Selector {
             Value {
                 value: UntaggedValue::Primitive(Primitive::String(s)),
                 ..
-            } => Ok(begin_selector_query(s, &self)
+            } => Ok(begin_selector_query(s, self)
                 .into_iter()
                 .map(ReturnSuccess::value)
                 .collect()),

crates/nu_plugin_selector/src/selector.rs

@@ -48,7 +48,7 @@ fn execute_selector_query_with_attribute(
 ) -> Vec<Value> {
     let doc = Document::from(input_string);
 
-    doc.select(&query_string)
+    doc.select(query_string)
         .iter()
         .map(|selection| {
             selection
@@ -64,12 +64,12 @@ fn execute_selector_query(input_string: &str, query_string: &str, as_html: bool)
 
     match as_html {
         true => doc
-            .select(&query_string)
+            .select(query_string)
             .iter()
             .map(|selection| selection.html().to_string().to_string_value_create_tag())
             .collect(),
         false => doc
-            .select(&query_string)
+            .select(query_string)
             .iter()
             .map(|selection| selection.text().to_string().to_string_value_create_tag())
             .collect(),

crates/nu_plugin_textview/src/config.rs

@@ -16,6 +16,7 @@ pub struct Config {
     pub pager: String,
     pub line_ranges: bat::line_range::LineRanges,
     // TODO: Not configurable
+    #[allow(unused)]
     highlight_range: String,
     // TODO: Not configurable
     pub highlight_range_from: u64,

crates/nu_plugin_tree/src/nu/mod.rs

@@ -13,7 +13,7 @@ impl Plugin for TreeViewer {
     fn sink(&mut self, _call_info: CallInfo, input: Vec<Value>) {
         if !input.is_empty() {
             for i in input.iter() {
-                let view = TreeView::from_value(&i);
+                let view = TreeView::from_value(i);
                 let _ = view.render_view();
             }
         }