dtaniwaki/rack-dev-mark — pull request #9 by zoombody (2014-07-08 15:18:06+00:00)
Title: CI test against Ruby 2.1.x

Ruby switched to semantic versioning as of 2.1, so the third version level is now just the patch level. Using `2.1` is equivalent to the `1.9.3` and `2.0.0` version specifications: it will point to the latest patch level (that rvm knows about).