Merge pull request #11748 from bganicky/patch-1

Updated .scale() mixin so that it accepts optional vertical scale factor...

less/mixins.less

@@ -150,10 +150,10 @@
       -ms-transform: rotate(@degrees); // IE9+
           transform: rotate(@degrees);
 }
-.scale(@ratio) {
-  -webkit-transform: scale(@ratio);
-      -ms-transform: scale(@ratio); // IE9+
-          transform: scale(@ratio);
+.scale(@ratio; @ratio-y...) {
+  -webkit-transform: scale(@ratio, @ratio-y);
+      -ms-transform: scale(@ratio, @ratio-y); // IE9+
+          transform: scale(@ratio, @ratio-y);
 }
 .translate(@x; @y) {
   -webkit-transform: translate(@x, @y);