Fix case of color options to ls

src/cli.rs

@@ -655,6 +655,17 @@ pub enum ColorWhen {
     Never,
 }
 
+impl ColorWhen {
+    pub fn as_str(&self) -> &'static str {
+        use ColorWhen::*;
+        match *self {
+            Auto => "auto",
+            Always => "always",
+            Never => "never",
+        }
+    }
+}
+
 // there isn't a derive api for getting grouped values yet,
 // so we have to use hand-rolled parsing for exec and exec-batch
 pub struct Exec {

src/main.rs

@@ -293,7 +293,7 @@ fn extract_command(opts: &mut Opts, colored_output: bool) -> Result<Option<Comma
             if !opts.list_details {
                 return None;
             }
-            let color_arg = format!("--color={:?}", opts.color);
+            let color_arg = format!("--color={}", opts.color.as_str());
 
             let res = determine_ls_command(&color_arg, colored_output)
                 .map(|cmd| CommandSet::new_batch([cmd]).unwrap());