joshuaclayton/blueprint-css — pull request #20 by nemoDreamer (2013-09-13 20:27:01+00:00)
Title: Small tweaks to compress.rb (optional PNG grid flag, fixed semantic classes for ruby 1.9+)

ChunkyPNG seems to be flaky on a lot of peoples dev environments, so i made it optional w/ the -g flag.
Semantic Classes was using Array's implicit .to_s, which causes a ["...", "..."] output in newer versions of Ruby.