Avoid redundant field names

src/hyperfine/internal.rs

@@ -123,7 +123,7 @@ fn test_compute_relative_speed() {
 
     let create_result = |name: &str, mean| BenchmarkResult {
         command: name.into(),
-        mean: mean,
+        mean,
         stddev: 1.0,
         median: mean,
         user: mean,

src/hyperfine/types.rs

@@ -23,14 +23,14 @@ pub struct Command<'a> {
 impl<'a> Command<'a> {
     pub fn new(expression: &'a str) -> Command<'a> {
         Command {
-            expression: expression,
+            expression,
             parameter: None,
         }
     }
 
     pub fn new_parametrized(expression: &'a str, parameter: &'a str, value: i32) -> Command<'a> {
         Command {
-            expression: expression,
+            expression,
             parameter: Some((parameter, value)),
         }
     }