milkbikis/powerline-shell — pull request #60 by rbanffy (2013-01-27 17:43:49+00:00)
Title: Prevents breakage when using the Linux console

When I went back to the Linux console (plugged-in a weird monitor, had to restart X), I noticed the powerline-shell prompt looked wrong without the Unicode chars. This sidesteps the problem by preventing the prompt from being changed in such situations.

Fish, unfortunately, defeated me.