thoughtbot/paperclip — pull request #1569 by caneroj1 (2014-06-12 22:06:32+00:00)
Title: addressed issue #1324 for URL escaping of (, ), [, and ] characters.

As detailed https://github.com/thoughtbot/paperclip/issues/1324, URL escaping did not work for the characters: (, ), [, and ]. This should fix that problem and escape them properly with their correct % escaping symbol.