pypa/pip — pull request #2086 by dstufft (2014-10-06 11:45:32+00:00)
Title: Include a "simple" User-Agent string as well as the JSON

To facilitate detection of pip in scenarios where parsing JSON isn't easy but simple string matching is, change the User-Agent to be of the form ``"pip/{version} {json}"`` instead of just ``"{json}"``.

The contents of the JSON data has not changed.