formatted core.less

build/less/core.less

@@ -47,7 +47,7 @@ body {
 .main-footer {
   //Using disposable variable to join statements with a comma
   @transition-rule: @transition-speed @transition-fn,
-                    margin @transition-speed @transition-fn;
+    margin @transition-speed @transition-fn;
   .transition-transform(@transition-rule);
   margin-left: @sidebar-width;
   z-index: 820;