useless: fix syntax warning

storage: shorten code

bot/useless.py

@@ -114,7 +114,7 @@ class Useless(DatabasePlugin):
     @irc3.event(r'(?i)^:\S+ PRIVMSG (?P<target>\S+) :.*(woah|whoa).*$')
     def woah(self, target: str):
         """Colorize words in a sentence with rainbow colors."""
-        if random.randint(0, 4) is 0:
+        if random.randint(0, 4) == 0:
             self.bot.privmsg(target, random.choice(self.WOAH))
 
     @irc3.event(r'(?i)^:\S+ PRIVMSG (?P<target>\S+) :(?P<msg>huehuehue)$')