contast -> contrast

src/libsyntax/parse/parser.rs

@@ -3800,7 +3800,7 @@ impl<'a> Parser<'a> {
     }
 
     /// A wrapper around `parse_pat` with some special error handling for the
-    /// "top-level" patterns in a match arm, `for` loop, `let`, &c. (in contast
+    /// "top-level" patterns in a match arm, `for` loop, `let`, &c. (in contrast
     /// to subpatterns within such).
     pub fn parse_top_level_pat(&mut self) -> PResult<'a, P<Pat>> {
         let pat = self.parse_pat()?;