tricycle/predictionbook — pull request #27 by 75th (2013-07-12 12:05:04+00:00)
Title: Allow digits in user email domain names

I just tried to sign up with my email address, accounts@75thtrombone.com, and was told that that didn't "look like" an email address. I don't know Rails, or even Ruby itself, but I do know regular expressions, so I went hunting to see if a faulty regex was to blame, and found this.