better comment

Author: lengyijun

clippy_lints/src/borrow_deref_ref.rs

@@ -14,10 +14,7 @@ declare_clippy_lint! {
     /// Checks for `&*(&T)`.
     ///
     /// ### Why is this bad?
-    /// When people deref on an immutable reference `&T`, they may expect return `&U`.
-    /// Accutually `&* (&T)` is still `&T`.
-    /// if you want to deref explicitly, `&** (&T)` is what you need.
-    /// If you want to reborrow, `&T` is enough (`&T` is Copy).
+    /// Dereferencing and then borrowing a reference value has no effect in most cases.
     ///
     /// ### Known problems
     /// false negative on such code: