command : suppression d'un autre nombre magique

src/command.rs

@@ -12,6 +12,10 @@ impl ExitCode {
     pub fn get(&self) -> u8 {
         self.exit_code
     }
+
+    pub fn not_found() -> Self {
+        Self { exit_code: 127 }
+    }
 }
 
 pub trait Command {
@@ -99,7 +103,7 @@ impl Command for UnixProgram {
         } else {
             let message = format!("{}: command not found", &program);
             error::print_error(message);
-            ExitCode::new(127)
+            ExitCode::not_found()
         }
     }
 }