Update spacing in core/base

Author: drewbarontini

source/assets/stylesheets/core/_base.sass

@@ -24,13 +24,15 @@ code,
 blockquote
   @extend %l-card
   font-size: 90%
+
 pre
   margin: 0 0 rem($base-whitespace)
   padding: rem(10px)
   code
     border: 0
     box-shadow: none
     font-size: rem(16px)
+
 blockquote
   font-size: 100%
   font-style: italic