rails/rails — pull request #7730 by beyond (2012-09-22 09:22:15+00:00)
Title: added compress options for gzip

Zlib::GzipWriter can take two optional arguments, compression level and strategy. This fix is to pass these arguments.

http://www.ensta-paristech.fr/~diam/ruby/online/ruby-doc-stdlib/libdoc/zlib/rdoc/classes/Zlib/GzipWriter.html