BLThunder1991/BLThunder1991-sezemi-2014-readable-code-2 — pull request #8 by kou (2014-07-08 13:27:23+00:00)
Title: Fix misleading function name

"usage()" name will mean one of them:

* It returns "usage string".
* It shows "usage".
* ...

But "usage()" will not check arguments because "usage" term doesn't mean
"check" nor "validate".