I decided to create a fork of rouge as rouge lacks a HTML formatter with
the required options such as wrapping a line with <span> tags.
Furthermore I was not really convinced about the clarity of rouge's
source code.
Rugments 1.0.0beta3 for now only includes some basic linting and a new
HTML formatter. Everything else should behave the same.
Checking the site with the PageSpeed extension, one of the reports was
in reducing image size. This reduced the number of bytes by 67%.
It was done with optipng -o7 -fix *.png in the app/assets/images dir.
References:
optipng: http://optipng.sourceforge.net/
PageSpeed extension: https://developers.google.com/speed/docs/insights/using_chrome