refactoring: fix clippy warnings in logout execute function

src/builtins/logout.rs

@@ -9,13 +9,17 @@ impl Builtin for Logout {
     fn execute(&mut self, _: &mut BuiltinConfig, _: Vec<String>) -> Result<(), ShellError> {
         let mut input_confirmation = String::new();
         println!("Are you sure? Unsaved data will be lost.\ny/n");
-        io::stdin().read_line(&mut input_confirmation).expect("Couldn't read form stdin");
-        if input_confirmation.chars().next().unwrap() == 'y' {
+        io::stdin()
+            .read_line(&mut input_confirmation)
+            .expect("Couldn't read form stdin");
+        if input_confirmation.starts_with('y') {
             match logout() {
                 Ok(_) => println!("Logging out"),
-                Err(error) => eprintln!("Failed to log out: {}", error),
+                Err(error) => eprintln!("Failed to log out: {error}"),
             }
-        } else { println!("Aborting"); }
+        } else {
+            println!("Aborting");
+        }
         Ok(())
     }
 }