Merge pull request #309 from sibrus/dev

Improved the appearance of code blocks when printing.

source/stylesheets/print.css.scss

@@ -48,6 +48,12 @@ body {
     font-size: 0.8em;
   }
 
+  pre {
+    code {
+      border: 0;
+    }
+  }
+
   pre {
     padding: 1.3em;
   }