Merge pull request twbs#195 from hlb/2.1-wip

remove esacpe function from less code

Author: thomas-mcdonald

vendor/assets/stylesheets/bootstrap/_buttons.scss

@@ -48,7 +48,7 @@
   &.active,
   &:active {
     background-color: darken($white, 10%);
-    background-color: darken($white, 15%) e("\9");
+    background-color: darken($white, 15%) \9;
     background-image: none;
     outline: 0;
     @include box-shadow(#{inset 0 2px 4px rgba(0,0,0,.15), 0 1px 2px rgba(0,0,0,.05)});
@@ -208,4 +208,4 @@ input[type="submit"].btn {
   color: $linkColorHover;
   text-decoration: underline;
   background-color: transparent;
-}
+}