Add ability to skip/disable a particular test

[Andrew Miner]

In other test frameworks (e.g., Karma), you can add an x in front of a test to skip that test. This is similar to (but with an opposite effect from) adding an f in front of a test to focus on just that test.

[Raúl Villares]

Hi Andrew,

I think you can achieve that by adding an underscore (like "_it").

Cheers!