Support ACTION messages with no space

More or less IRC compliant, like all IRC things.
See https://tools.ietf.org/id/draft-oakley-irc-ctcp-01.html#rfc.appendix.A.1
3 jobs for master in 56 seconds (queued for 2 seconds)
Status Name Job ID Coverage
  Test
passed eslint #9620

00:00:31

passed irc #9621

00:00:54

passed irc-with-weak-value-map #9622

00:00:56