Add comment delimiters

[aspiwack]

Closes #12.

[purcell]

You might also consider setting comment-start-skip to "#+\\s-*".

[aspiwack]

I checked the documentation before writing my PR, and my understanding was that comment-start-skip was to detect already commented bits for comment-dwim. I checked that comment-dwim worked fine (it did), so I didn't bother with comment-start-skip. Did I miss something?

[purcell]

Hmm, I don't know — most modes I've seen tend to set up both vars, so the cargo cult wisdom is apparently that only comment-start is required, but that it is Good Practice™ to set comment-start-skip too. I confess to being unaware of the specific reasons, if any actually exist. 😅

[aspiwack]

Ok. Then, with your permission, I'm going to Ockham-razor this one, and leave comment-start-skip out until something goes wrong 🙂 .

[purcell]

Haha, you certainly don't need my blessing to ignore this entirely for now!