mozilla/kuma — pull request #1730 by openjck (2013-12-05 18:44:10+00:00)
Title: Rename StackOverflow to Stack Overflow throughout

> Stack Overflow is a programmer Q&A site on the Stack Exchange Network.
> As a name, Stack Overflow, is always written "Stack Overflow" (two
> words, capital letters).

http://stackexchange.com/legal/trademark-guidance