Always include padding in regular literal blocks

- This adds back in the original padding for literals
- This uses negative padding to remove it for rouge code blocks

Without the negative padding, code blocks get double padding.

_stylesheets/docs.css

@@ -906,7 +906,7 @@ table > tbody > tr > td > div > div > p > code {
  .literalblock pre, .literalblock pre[class], .listingblock pre, .listingblock pre[class] {
      background-color: #f9f9f9;
      border: 1px #aab7b8 solid;
-     padding: 0 0.5em;
+     padding: 1.75em 2em;
      word-wrap: break-word;
      color: #404040;
      font-family: "Roboto Mono", monospace;
@@ -920,8 +920,10 @@ table > tbody > tr > td > div > div > p > code {
      display: block;
 }
 /* this adds overflow for code blocks */
+/* negative padding undoes the parent padding for .iteralblock pre */
 .listingblock pre.rouge code {
   padding: 22px;
+  margin: -1.75em -2em;
   white-space: pre;
   overflow-x: auto;
 }