modules/notification/irc: Fix channel joining for some IRC servers. (#55444)
modules/notification/irc: Fix channel joining for some IRC servers. (#55444)

* Fix channel joining for some IRC servers.

Some IRC servers may return the channel in a different case than
requested.  For instance, you might request "foo" but the server
returns "FOO".  The regular expression matching must be case-insensitive
for the join response in order to handle this.

* ansible style guidelines want spaces

thaim/ansible,thaim/ansible