Merge updates into master

[mayorbyrne]

Was just playing around and re-familiarizing myself with the library, doing some unit testing, and realized if you pass nothing into .pass() or .fail() there was a trailing - logged. This PR attempts to fix this. No worries if this is garbage and gets rejected.

[coreybutler]

I'm finally getting around to this. Is there really a trailing -? The - is part of the TAP spec, so I'm assuming use of pass() or fail() with no parameter is interpreting this as an empty string.

I think something should be done about this, but instead of eliminating the dash, perhaps it would be better to have a default message like pass or fail. This way the output is clear. If someone sees a generic pass/fail message, it should be an indicator they need to specify a more specific message (i.e. prompt them to add a parameter to pass() or fail()).

In other words, this line pass (msg = '', directive = null) { would change to pass (msg = 'pass', directive = null) { and the fail function would do the same thing.