From a266bda393ecbea53a040763eb94afe57a259a7c Mon Sep 17 00:00:00 2001
From: "Felix S. Klock II" <pnkfelix@pnkfx.org>
Date: Mon, 25 Mar 2013 15:22:19 +0100
Subject: [PATCH] Fixes mozilla/rust#3612.

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

diff --git a/src/libcore/iter.rs b/src/libcore/iter.rs
index f94c62d23ec..58a514dc0ee 100644
--- a/src/libcore/iter.rs
+++ b/src/libcore/iter.rs
@@ -284,7 +284,8 @@ pub fn build_sized_opt<A,B: Buildable<A>>(size: Option<uint>,
 
 // Functions that combine iteration and building
 
-/// Applies a function to each element of an iterable and returns the results.
+/// Applies a function to each element of an iterable and returns the results
+/// in a sequence built via `BU`.  See also `map_to_vec`.
 #[inline(always)]
 pub fn map<T,IT: BaseIter<T>,U,BU: Buildable<U>>(v: &IT, f: &fn(&T) -> U)
     -> BU {