Fix clippy suggestions

src/options.rs

@@ -110,21 +110,16 @@ impl Default for RunBounds {
     }
 }
 
-#[derive(Debug, Clone, PartialEq)]
+#[derive(Debug, Default, Clone, PartialEq)]
 pub enum CommandInputPolicy {
     /// Read from the null device
+    #[default]
     Null,
 
     /// Read input from a file
     File(PathBuf),
 }
 
-impl Default for CommandInputPolicy {
-    fn default() -> Self {
-        CommandInputPolicy::Null
-    }
-}
-
 impl CommandInputPolicy {
     pub fn get_stdin(&self) -> io::Result<Stdio> {
         let stream: Stdio = match self {
@@ -141,9 +136,10 @@ impl CommandInputPolicy {
 }
 
 /// How to handle the output of benchmarked commands
-#[derive(Debug, Clone, PartialEq, Eq)]
+#[derive(Debug, Clone, PartialEq, Eq, Default)]
 pub enum CommandOutputPolicy {
     /// Redirect output to the null device
+    #[default]
     Null,
 
     /// Feed output through a pipe before discarding it
@@ -156,12 +152,6 @@ pub enum CommandOutputPolicy {
     Inherit,
 }
 
-impl Default for CommandOutputPolicy {
-    fn default() -> Self {
-        CommandOutputPolicy::Null
-    }
-}
-
 impl CommandOutputPolicy {
     pub fn get_stdout_stderr(&self) -> io::Result<(Stdio, Stdio)> {
         let streams = match self {