Set line-height for conisitent look of Liberation Mono

Author: jessetan

sass/_theme_rst.sass

@@ -93,7 +93,7 @@
   pre.literal-block, div[class^='highlight'] pre, .linenodiv pre
     font-family: $code-font-family
     font-size: 12px
-    line-height: normal
+    line-height: 1.4
 
   @media print
     .codeblock, div[class^='highlight'], div[class^='highlight'] pre