thoughtbot/paperclip — pull request #1594 by phstc (2014-07-08 13:23:31+00:00)
Title: Add a test case for protocol-relative URL `s3_protocol`

Just added a test example of [protocol-relative URLs](https://en.wikipedia.org/wiki/Uniform_resource_locator#Protocol-relative_URLs). As there are no examples in the documentation a test could be helpful to check the usage.