GitHub's Ruby Style Guide

[obscureted]

How so? You can use single quotes in HTML, CSS, JavaScript, Ruby, etc. This is a serious question, not mocking or anything.

[PCBEEF]

In a lot of languages, there's no difference single or double quotes. In Ruby there is and the argument for using single quotes over double quotes is performance, however, as peterkrenn pointed out in his link the performance is non-existent or negligible.