Sass quality fixes in the LMS

lms/static/sass/shared/_forms.scss

@@ -15,7 +15,7 @@ label {
     font-size: 12px;
     line-height: 1.5em;
     font-weight: normal;
-    width: calc( 100% - 25px );
+    width: calc(100% - 25px);
     padding-top: 2px;
     position: relative;
     float: right;
@@ -33,7 +33,9 @@ input[type="tel"] {
   border: 1px solid $border-color-2;
   border-radius: 3px;
   box-shadow: 0 1px 0 0 rgba(255,255,255, 0.6), inset 0 0 3px 0 $shadow-l1;
+
   @include box-sizing(border-box);
+
   font: italic 300 1rem/1.6rem $serif;
   height: 35px;
   padding: ($baseline/4) 12px;
@@ -58,7 +60,9 @@ input[type="submit"],
 input[type="button"],
 button,.button {
   border-radius: 3px;
+
   @include button(shiny, $button-color);
+
   font: normal 1.2rem/1.6rem $sans-serif;
   letter-spacing: 1px;
   padding: 4px 20px;