rubyzip/rubyzip — pull request #155 by mrloop (2014-04-17 12:30:33+00:00)
Title: Don't send empty string to stream

Unneeded method call removed. Don't call << if not needed
This was causing an issue in rails 4 and zipline. Which is now fixed https://github.com/fringd/zipline/pull/10 . However fixing this issue in rubyzip might prevent hard to track down bug for somebody else.