update description of manual_repeat_n

clippy_lints/src/methods/mod.rs

@@ -4319,7 +4319,7 @@ declare_clippy_lint! {
     ///
     /// ### Why is this bad?
     ///
-    /// Using `repeat_n()` is more concise and clearer. Also, `repeat_n()` is sometimes faster than `repeat().take()` when the type of the element is non-trivial to clone.
+    /// Using `repeat_n()` is more concise and clearer. Also, `repeat_n()` is sometimes faster than `repeat().take()` when the type of the element is non-trivial to clone because the original value can be reused for the last `.next()` call rather than always cloning.
     ///
     /// ### Example
     /// ```no_run