odd code-blocks on mobile display (portrait only)

[2bndy5]

First off, thank you for this wonderful theme! In migrating my python lib's docs to using it, I noticed that all the code-blocks are clipping the first 2 characters (and the last 2 characters of the longest lines) when viewing it on a mobile display. Maybe "clipping" isn't the right description because the code in code-blocks without linenumbers just overflow the code-blocks' background box.

For examples you can load the demonstration site's "Additional Samples->Code" on a phone or shrink the browser window to minimum width.