fix typo: s/tained/tainted/

diff --git a/src/librustc/infer/region_constraints/mod.rs b/src/librustc/infer/region_constraints/mod.rs
index 4040e6677e967874a00b9ca3d37eba4d9cf632d3..525ae03dfaf934eca8931a5ff93353fd5efa90f4 100644 (file)
--- a/src/librustc/infer/region_constraints/mod.rs
+++ b/src/librustc/infer/region_constraints/mod.rs
@@ -309,7 +309,7 @@ pub struct RegionSnapshot {
 /// When working with placeholder regions, we often wish to find all of
 /// the regions that are either reachable from a placeholder region, or
 /// which can reach a placeholder region, or both. We call such regions
-/// *tained* regions.  This struct allows you to decide what set of
+/// *tainted* regions.  This struct allows you to decide what set of
 /// tainted regions you want.
 #[derive(Debug)]
 pub struct TaintDirections {