Fix clippy warnings

crates/nu-engine/src/eval.rs

@@ -58,7 +58,7 @@ pub fn eval_expression(
         Expr::Range(from, to, operator) => {
             // TODO: Embed the min/max into Range and set max to be the true max
             let from = if let Some(f) = from {
-                eval_expression(context, &f)?
+                eval_expression(context, f)?
             } else {
                 Value::Int {
                     val: 0i64,
@@ -67,7 +67,7 @@ pub fn eval_expression(
             };
 
             let to = if let Some(t) = to {
-                eval_expression(context, &t)?
+                eval_expression(context, t)?
             } else {
                 Value::Int {
                     val: 100i64,

crates/nu-parser/src/parser.rs

@@ -738,14 +738,12 @@ pub fn parse_range(
             ),
         };
 
-    let step_op_span = if let Some(pos) = step_op_pos {
-        Some(Span::new(
+    let step_op_span = step_op_pos.map(|pos| {
+        Span::new(
             span.start + pos,
             span.start + pos + "..".len(), // Only ".." is allowed for step operator
-        ))
-    } else {
-        None
-    };
+        )
+    });
 
     let (range_op, range_op_str, range_op_span) = if let Some(pos) = token.find("..<") {
         if pos == range_op_pos {
@@ -849,12 +847,10 @@ pub(crate) fn parse_dollar_expr(
 
     if contents.starts_with(b"$\"") {
         parse_string_interpolation(working_set, span)
+    } else if let (expr, None) = parse_range(working_set, span) {
+        (expr, None)
     } else {
-        if let (expr, None) = parse_range(working_set, span) {
-            (expr, None)
-        } else {
-            parse_variable_expr(working_set, span)
-        }
+        parse_variable_expr(working_set, span)
     }
 }
 

crates/nu-protocol/src/value.rs

@@ -239,7 +239,7 @@ impl Value {
                     vals.iter()
                         .map(|x| x.to_string())
                         .collect::<Vec<String>>()
-                        .join(", ".into())
+                        .join(", ")
                 )
             }
             Value::String { val, .. } => val,