From 262d5a4686c80675fe5bfcb79b26b341b9a0bf7a Mon Sep 17 00:00:00 2001
From: root <root@localhost>
Date: Sat, 23 Aug 2014 15:51:07 +0200
Subject: [PATCH] std: Use concat! and stringify! to simplify the most common
 assert! case.

With no custom message, we should just use concat! + stringify! for
`assert!(expr)`.

Inspired by issue #16625
---
 src/libstd/macros.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/libstd/macros.rs b/src/libstd/macros.rs
index 85e614ab47e..0ebca006c4c 100644
--- a/src/libstd/macros.rs
+++ b/src/libstd/macros.rs
@@ -96,7 +96,7 @@ macro_rules! fail(
 macro_rules! assert(
     ($cond:expr) => (
         if !$cond {
-            fail!("assertion failed: {:s}", stringify!($cond))
+            fail!(concat!("assertion failed: ", stringify!($cond)))
         }
     );
     ($cond:expr, $($arg:expr),+) => (