thoughtbot/appraisal — pull request #44 by tricknotes (2013-03-02 11:33:04+00:00)
Title: Replace `source :rubygems` with url for rubygems.org

Bundler (1.3.0) says:

```
The source :rubygems is deprecated because HTTP requests are insecure.
Please change your source to 'https://rubygems.org' if possible, or 'http://rubygems.org' if not.
```