develop: use new super() syntax to call parent constructors

develop/advanced_plugin_config.rst

@@ -463,8 +463,7 @@ when `supybot.nick` is edited. You can do it like this::
         """Some useless plugin."""
 
         def __init__(self, irc):
-            self.__parent = super(LogNickChange, self)
-            self.__parent.__init__(irc)
+            super().__init__(irc)
             conf.supybot.nick.addCallback(self._configCallback)
 
         def _configCallback(self, name=None):
@@ -477,8 +476,7 @@ show a warning instead of crashing on those versions::
         """Some useless plugin."""
 
         def __init__(self, irc):
-            self.__parent = super(LogNickChange, self)
-            self.__parent.__init__(irc)
+            super().__init__(irc)
             try:
                 conf.supybot.nick.addCallback(self._configCallback)
             except registry.NonExistentRegistryEntry:

develop/plugin_tutorial.rst

@@ -260,8 +260,8 @@ Here we'll also seed it with the current time (standard practice for RNGs).
 Here's what our __init__ looks like::
 
     def __init__(self, irc):
-        self.__parent = super(Random, self)
-        self.__parent.__init__(irc)
+        # Make sure to call the superclass' constructor when you define a custom one
+        super().__init__(irc)
         self.rng = random.Random()   # create our rng
         self.rng.seed()   # automatically seeds with current time
 

develop/schedule.rst

@@ -28,9 +28,7 @@ Event scheduling using supybot.schedule
        This should describe *how* to use this plugin."""
 
        def __init__(self, irc):
-           # these two lines are required if you have a custom __init__()
-           self.__parent = super(Spam, self)
-           self.__parent.__init__(irc)
+           super().__init__(irc)
            # this is the channel we want to spam, and how frequently we want to do it.
            # It would be nicer to put it in a supybot config variable instead, but for
            # this demonstration, defining it in the plugin itself is fine.