twitter/twitter-text-rb — pull request #103 by yaauie (2013-12-19 21:41:24+00:00)
Title: Solution for #94: username link drops capitalisation

Because `name` and `chunk` can be references to the same object,
the destructive `name.downcase!` also affects `chunk`. This patch
ensures that the two are never the same object, and avoids the
unintended side-effect.