Test word wrap: normal

This is to solve an issue with Firefox where words are broken very unnaturally in comment bodies, as reported here: http://sandbox.microco.sm/conversations/852/#comment11818.

There are a few points:
* Lets the browser decide the best way to wrap long lines
* Doesn't break any words (leading to potentially wider comment div or missing content)
* Unsure of the effect on code and table blocks.

More testing is needed.