MathieuTurcotte/node-precond — pull request #1 by diwu1989 (2013-05-31 04:10:43+00:00)
Title: Adding default messages to each check.

If the user doesnt specify the message format, there's no information given except illegal state exception or illegal argument exception. We don't even know if it's from a checkIsNumber or checkIsBoolean without looking at the stack trace.