visionmedia/debug — pull request #89 by yorkie (2014-05-01 08:46:48+00:00)
Title: Returns the value of debug.enable()

See example:
```js
var debug = require('debug')('alert');
if (!debug('sent a fake email')) {
myRealSentMailFunction();
}
```

I think it is better if debug's `fmt` function could returns the value if debugging.
:)