carrierwaveuploader/carrierwave — pull request #1448 by mlaco (2014-08-27 17:11:52+00:00)
Title: Make example in README more clear.

The example given in the README may make it seem like in order to assign a file, you have to make two consecutive assignments, once with params and once with a file. I think adding some comments would make it more clear that these are two mutually exclusive options.