Break markdown links better

[gfontenot]

Right now, since we're breaking on word boundaries (spaces), you will frequently run into text that's rendered like this:

* [This is the link
text](http://example.com)

This is gross, and it'd be nicer if we could break on ( instead:

* [This is the link text]
(http://example.com)

Another alternative might be to not break on markdown links at all, and just leave them all as one line.

[tonyd256]

I personally prefer the look of not breaking on markdown links at all.