From 912a872d3c7e12a5d9784c3bfd4cd3c911e468d9 Mon Sep 17 00:00:00 2001
From: Theo Belaire <tyr.god.of.war.42@gmail.com>
Date: Sun, 12 Apr 2015 01:10:53 -0400
Subject: [PATCH] Fixed with_extension documentation bug

It was mistakenly calling it with "foo.txt" instead of "txt".
I've also added an assert.
---
 src/libstd/path.rs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/libstd/path.rs b/src/libstd/path.rs
index 4471b5afa84c8..9215c93ca1c6f 100644
--- a/src/libstd/path.rs
+++ b/src/libstd/path.rs
@@ -1574,7 +1574,8 @@ impl Path {
     ///
     /// let path = Path::new("/tmp/foo.rs");
     ///
-    /// let new_path = path.with_extension("foo.txt");
+    /// let new_path = path.with_extension("txt");
+    /// assert_eq!(new_path, PathBuf::from("/tmp/foo.txt"));
     /// ```
     #[stable(feature = "rust1", since = "1.0.0")]
     pub fn with_extension<S: AsRef<OsStr>>(&self, extension: S) -> PathBuf {