fix test

Author: dnbln

clippy_lints/src/needless_move.rs

@@ -66,6 +66,7 @@ declare_clippy_lint! {
     /// with the `move` keyword, even if it's not necessary:
     ///
     /// ```no_run
+    /// # fn function_that_does_something_with(_: String) {}
     /// let a = String::new();
     /// std::thread::spawn(move || {
     ///    // ...