squashme: use user.nick instead of hard-coded string in find tests

Co-authored-by: Florian Strzelecki <[email protected]>

Author: dgw

test/builtins/test_builtins_find.py

@@ -49,13 +49,13 @@ def channel():
 
 @pytest.mark.parametrize('original, command, result', REPLACES_THAT_WORK)
 def test_valid_replacements(bot, irc, user, channel, original, command, result):
-    irc.channel_joined(channel, ['User'])
+    irc.channel_joined(channel, [user.nick])
 
     irc.say(user, channel, original)
     irc.say(user, channel, command)
 
     assert len(bot.backend.message_sent) == 1, (
         "The bot should respond with exactly one line.")
     assert bot.backend.message_sent == rawlist(
-        "PRIVMSG %s :User meant to say: %s" % (channel, result),
+        "PRIVMSG %s :%s meant to say: %s" % (channel, user.nick, result),
     )