Apply clippy fix (#7193)

# Description

rust 1.65.0 has been released for a while, this pr applies lint
suggestions from rust 1.65.0.

# User-Facing Changes

N/A

# Tests + Formatting

Don't forget to add tests that cover your changes.

Make sure you've run and fixed any issues with these commands:

- `cargo fmt --all -- --check` to check standard code formatting (`cargo
fmt --all` applies these changes)
- `cargo clippy --workspace --features=extra -- -D warnings -D
clippy::unwrap_used -A clippy::needless_collect` to check that you're
using the standard code style
- `cargo test --workspace --features=extra` to check that all tests pass

# After Submitting

If your PR had any user-facing changes, update [the
documentation](https://github.com/nushell/nushell.github.io) after the
PR is merged, if necessary. This will help us keep the docs up to date.

crates/nu-command/src/database/commands/into_sqlite.rs

@@ -4,8 +4,8 @@ use nu_engine::CallExt;
 use nu_protocol::ast::Call;
 use nu_protocol::engine::{Command, EngineState, Stack};
 use nu_protocol::{
-    Category, Config, Example, IntoPipelineData, PipelineData, ShellError, Signature, Span,
-    Spanned, SyntaxShape, Type, Value,
+    Category, Example, IntoPipelineData, PipelineData, ShellError, Signature, Span, Spanned,
+    SyntaxShape, Type, Value,
 };
 use std::iter;
 use std::path::Path;
@@ -83,14 +83,13 @@ fn operate(
     input: PipelineData,
 ) -> Result<PipelineData, ShellError> {
     let span = call.head;
-    let config = engine_state.get_config();
     let file_name: Spanned<String> = call.req(engine_state, stack, 0)?;
     let table_name: Option<Spanned<String>> = call.get_flag(engine_state, stack, "table_name")?;
 
     // collect the input into a value
     let table_entries = input.into_value(span);
 
-    match action(&table_entries, table_name, file_name, config, span) {
+    match action(&table_entries, table_name, file_name, span) {
         Ok(val) => Ok(val.into_pipeline_data()),
         Err(e) => Err(e),
     }
@@ -100,7 +99,6 @@ fn action(
     input: &Value,
     table: Option<Spanned<String>>,
     file: Spanned<String>,
-    config: &Config,
     span: Span,
 ) -> Result<Value, ShellError> {
     let table_name = if let Some(table_name) = table {
@@ -133,10 +131,7 @@ fn action(
                             } => {
                                 vals.iter()
                                     .map(|rec_val| {
-                                        format!(
-                                            "'{}'",
-                                            nu_value_to_string(rec_val.clone(), "", config)
-                                        )
+                                        format!("'{}'", nu_value_to_string(rec_val.clone(), ""))
                                     })
                                     .join(",")
                             }
@@ -145,10 +140,10 @@ fn action(
                             | Value::Float { val: _, span: _ }
                             | Value::Filesize { val: _, span: _ }
                             | Value::Duration { val: _, span: _ } =>
-                                nu_value_to_string(list_value.clone(), "", config),
+                                nu_value_to_string(list_value.clone(), ""),
                             _ =>
                             // String formats so add quotes around them
-                                format!("'{}'", nu_value_to_string(list_value.clone(), "", config)),
+                                format!("'{}'", nu_value_to_string(list_value.clone(), "")),
                         }
                     )
                 })
@@ -231,7 +226,7 @@ fn action(
 }
 
 // This is taken from to text local_into_string but tweaks it a bit so that certain formatting does not happen
-fn nu_value_to_string(value: Value, separator: &str, config: &Config) -> String {
+fn nu_value_to_string(value: Value, separator: &str) -> String {
     match value {
         Value::Bool { val, .. } => val.to_string(),
         Value::Int { val, .. } => val.to_string(),
@@ -242,8 +237,8 @@ fn nu_value_to_string(value: Value, separator: &str, config: &Config) -> String
         Value::Range { val, .. } => {
             format!(
                 "{}..{}",
-                nu_value_to_string(val.from, ", ", config),
-                nu_value_to_string(val.to, ", ", config)
+                nu_value_to_string(val.from, ", "),
+                nu_value_to_string(val.to, ", ")
             )
         }
         Value::String { val, .. } => {
@@ -253,13 +248,13 @@ fn nu_value_to_string(value: Value, separator: &str, config: &Config) -> String
         }
         Value::List { vals: val, .. } => val
             .iter()
-            .map(|x| nu_value_to_string(x.clone(), ", ", config))
+            .map(|x| nu_value_to_string(x.clone(), ", "))
             .collect::<Vec<_>>()
             .join(separator),
         Value::Record { cols, vals, .. } => cols
             .iter()
             .zip(vals.iter())
-            .map(|(x, y)| format!("{}: {}", x, nu_value_to_string(y.clone(), ", ", config)))
+            .map(|(x, y)| format!("{}: {}", x, nu_value_to_string(y.clone(), ", ")))
             .collect::<Vec<_>>()
             .join(separator),
         Value::Block { val, .. } => format!("<Block {}>", val),

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

@@ -1,3 +1,4 @@
+use indexmap::IndexMap;
 use nu_engine::CallExt;
 use nu_protocol::ast::Call;
 use nu_protocol::engine::{Command, EngineState, Stack};
@@ -213,9 +214,8 @@ pub fn data_split(
                         } = grouped
                         {
                             for (inner_idx, subset) in li.iter().enumerate() {
-                                let s = splits
-                                    .entry(sub_cols[inner_idx].clone())
-                                    .or_insert(indexmap::IndexMap::new());
+                                let s: &mut IndexMap<String, Value> =
+                                    splits.entry(sub_cols[inner_idx].clone()).or_default();
 
                                 s.insert(cols[idx].clone(), subset.clone());
                             }

crates/nu-command/src/strings/encode_decode/base64.rs

@@ -100,7 +100,7 @@ fn action(
     match input {
         Value::Binary { val, .. } => match base64_config.action_type {
             ActionType::Encode => {
-                Value::string(encode_config(&val, base64_config_enum), command_span)
+                Value::string(encode_config(val, base64_config_enum), command_span)
             }
             ActionType::Decode => Value::Error {
                 error: ShellError::UnsupportedInput(

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

@@ -593,8 +593,8 @@ impl ExternalCommand {
                     for m in matches {
                         if let Ok(arg) = m {
                             let arg = if let Some(prefix) = &prefix {
-                                if let Ok(remainder) = arg.strip_prefix(&prefix) {
-                                    let new_prefix = if let Some(pfx) = diff_paths(&prefix, &cwd) {
+                                if let Ok(remainder) = arg.strip_prefix(prefix) {
+                                    let new_prefix = if let Some(pfx) = diff_paths(prefix, &cwd) {
                                         pfx
                                     } else {
                                         prefix.to_path_buf()

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

@@ -973,7 +973,7 @@ fn convert_to_table2<'a>(
             data[row].push(value);
         }
 
-        let count_columns = with_index.then(|| 2).unwrap_or(1);
+        let count_columns = if with_index { 2 } else { 1 };
         let size = (data.len(), count_columns);
         let table = NuTable::new(data, size, usize::MAX, with_header, with_index);
 

crates/nu-parser/src/parse_keywords.rs

@@ -1424,7 +1424,7 @@ pub fn parse_module_block(
                     }
                     LiteElement::Or(_, command)
                     | LiteElement::And(_, command)
-                    | LiteElement::Redirection(_, _, command) => (garbage_pipeline(&command.parts)),
+                    | LiteElement::Redirection(_, _, command) => garbage_pipeline(&command.parts),
                 }
             } else {
                 error = Some(ParseError::Expected("not a pipeline".into(), span));