zoccihedron/wpi-suite — pull request #362 by yyan2 (2014-05-01 02:00:43+00:00)
Title: Make change to regular expression so that email domain names can have

underscores
Now in email address, underscores can exist after @ and before dot but cannot exist right after @ sign
(@ a_a_a.aa is acceptable, but @ _ is not)