Convert multi-line commented regex into single-line proper
Admittedly, this page is trash & BetterRegex is currently trash, too... I'll probably make it nicer once BetterRegex is improved.
Comments require a space, two hashtags, then another space, THEN the actual comment text, like
someregex ## a comment. They also can't appear at the beginning of a line... Yeah. It's a little embarassing! lol