Update SCSS, fix bug where code annotations had wrong font.

source/stylesheets/all.css.scss

@@ -327,7 +327,6 @@ html, body {
     float:right;
     clear:right;
 
-    @extend %code-font;
     @include box-sizing(border-box);
     @include text-shadow(0px 1px 2px rgba(0,0,0,0.4));
 
@@ -340,6 +339,10 @@ html, body {
     }
   }
 
+  pre {
+    @extend %code-font;
+  }
+
   blockquote {
     &>p {
       background-color: $code-annotation-bg;