app/assets/stylesheets/twitter/bootstrap/_mixins.scss in bootstrap-sass-rails-3.0.0.2 vs app/assets/stylesheets/twitter/bootstrap/_mixins.scss in bootstrap-sass-rails-3.0.0.3

@@ -296,19 +296,19 @@
 // Retina images
 //
 // Short retina mixin for setting background-image and -size
 
 @mixin img-retina($file-1x, $file-2x, $width-1x, $height-1x) {
-  background-image: image-url("$file-1x");
+  background-image: image-url($file-1x);
 
   @media
   only screen and (-webkit-min-device-pixel-ratio: 2),
   only screen and (   min--moz-device-pixel-ratio: 2),
   only screen and (     -o-min-device-pixel-ratio: 2/1),
   only screen and (        min-device-pixel-ratio: 2),
   only screen and (                min-resolution: 192dpi),
   only screen and (                min-resolution: 2dppx) {
-    background-image: image-url("$file-2x");
+    background-image: image-url($file-2x);
     background-size: $width-1x $height-1x;
   }
 }