CleverRaven/Cataclysm-DDA — pull request #5254 by KA101 (2013-12-29 03:16:36+00:00)
Title: Don't overdig

When you're in a hole, best thing to do is to stop digging! This makes Pit terrain no longer diggable, so you can't perpetually dig and dig to toggle between shallow/deep Pits.

Thanks to nikow on the IRC for reporting.