Khan/khan-exercises — pull request #72158 by theinternetftw (2013-09-08 01:08:51+00:00)
Title: Spelling and word use fixes

Fixes #50857
Fixes #50485
Fixes #61779
Fixes #67757
Fixes #53299

Also removes some vars that never got used and some isSingular paths for vars that will always be plural.