From 81ef3da03cfb00eb16bd01d884fdc38835d9dfe0 Mon Sep 17 00:00:00 2001
From: Georg Brandl <georg@python.org>
Date: Tue, 25 Aug 2015 12:45:52 +0200
Subject: [PATCH] methods: people might be using to_string() to make a copy;
 add a hint for that

---
 src/methods.rs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/methods.rs b/src/methods.rs
index df8e35d98fb..40043be109a 100644
--- a/src/methods.rs
+++ b/src/methods.rs
@@ -41,7 +41,8 @@ impl LintPass for MethodsPass {
                 if obj_ty.sty == ty::TyStr {
                     span_lint(cx, STR_TO_STRING, expr.span, "`str.to_owned()` is faster");
                 } else if match_type(cx, obj_ty, &STRING_PATH) {
-                    span_lint(cx, STRING_TO_STRING, expr.span, "`String.to_string()` is a no-op");
+                    span_lint(cx, STRING_TO_STRING, expr.span, "`String.to_string()` is a no-op; use \
+                                                                `clone()` to make a copy");
                 }
             }
         }