_nav-divider.scss in material-sass-4.0.0.beta

- old
+ new

@@ -1,6 +1,6 @@
 @mixin nav-divider($bg: $black-divider) {
   background-color: $bg;
   height: 1px;
-  margin: $spacer-sm-y 0;
+  margin: $spacer-sm 0;
   overflow: hidden;
 }