ckan/ckan — pull request #2144 by george-sattler (2014-12-14 10:57:00+00:00)
Title: 1980 clearer error message for username

This fixes the un-clear message that a user gets when they try to register with a username that contains non-alphanumeric characters.

Needed to fix up a few tests too because they tried to match the old message string containing 'Url'