less strict karma regex, whitespace fix

Allows karma.coffee to take additional forms of <thing>

    <thing>: ++
    <thing> ++
    <thing>: --
    <thing> --

By changing the karma listening regex to:

    /(\S+[^-:\s])[: ]*--(\s|$)/

you can just take the regex change... I don't really care about the whitespace... obviously.