circe-command-FOOL: regexp-quote the nick

[offby1]

I hope the intent is obvious.

[wasamasa]

Not quite.

• Why does this only apply to /fool, not /ignore as well?
• How does one use regex if the need arises?
• This is not bullet-proof in terms of matching. Assuming you /fool 123 and there is someone with a ~user@foobar123.host.org usermask, they will get filtered as well. This occurred to me a few times and needed to be solved with anchoring. See Ignore rewrite #28 for more thoughts on the topic.

[jorgenschaefer]

Thank you for the contribution! :-) wasamasa has some good questions there, though. I suspect a good solution would be to check if there's an exclamation mark in the string. If not, regexp-quote and add !.*@.* – though it's not clear to me if it should do submatches, word matches, or only full matches …