Fix uses of super() in the codebase

Fix #3165, we don’t need to use the long form to get the superobject in
our supported python versions.

docs/getting_started/echobot.rst

@@ -70,7 +70,7 @@ as well.
     class EchoBot(slixmpp.ClientXMPP):
 
         def __init__(self, jid, password):
-            super(EchoBot, self).__init__(jid, password)
+            super().__init__(jid, password)
 
 Handling Session Start
 ~~~~~~~~~~~~~~~~~~~~~~
@@ -83,7 +83,7 @@ started. To do that, we will register an event handler for the :term:`session_st
 .. code-block:: python
 
      def __init__(self, jid, password):
-        super(EchoBot, self).__init__(jid, password)
+        super().__init__(jid, password)
 
         self.add_event_handler('session_start', self.start)
 
@@ -153,7 +153,7 @@ whenever a messsage is received.
 .. code-block:: python
 
      def __init__(self, jid, password):
-        super(EchoBot, self).__init__(jid, password)
+        super().__init__(jid, password)
 
         self.add_event_handler('session_start', self.start)
         self.add_event_handler('message', self.message)

docs/getting_started/sendlogout.rst

@@ -24,7 +24,7 @@ for the JID that will receive our message, and the string content of the message
     class SendMsgBot(slixmpp.ClientXMPP):
 
         def __init__(self, jid, password, recipient, msg):
-            super(SendMsgBot, self).__init__(jid, password)
+            super().__init__(jid, password)
 
             self.recipient = recipient
             self.msg = msg

examples/pubsub_client.py

@@ -15,7 +15,7 @@ class PubsubClient(slixmpp.ClientXMPP):
 
     def __init__(self, jid, password, server,
                        node=None, action='nodes', data=''):
-        super(PubsubClient, self).__init__(jid, password)
+        super().__init__(jid, password)
 
         self.register_plugin('xep_0030')
         self.register_plugin('xep_0059')

examples/pubsub_events.py

@@ -14,7 +14,7 @@ from slixmpp.xmlstream.handler import Callback
 class PubsubEvents(slixmpp.ClientXMPP):
 
     def __init__(self, jid, password):
-        super(PubsubEvents, self).__init__(jid, password)
+        super().__init__(jid, password)
 
         self.register_plugin('xep_0030')
         self.register_plugin('xep_0059')

examples/user_location.py

@@ -22,7 +22,7 @@ from slixmpp import ClientXMPP
 class LocationBot(ClientXMPP):
 
     def __init__(self, jid, password):
-        super(LocationBot, self).__init__(jid, password)
+        super().__init__(jid, password)
 
         self.add_event_handler('session_start', self.start)
         self.add_event_handler('user_location_publish',

examples/user_tune.py

@@ -17,7 +17,7 @@ from slixmpp import ClientXMPP
 class TuneBot(ClientXMPP):
 
     def __init__(self, jid, password):
-        super(TuneBot, self).__init__(jid, password)
+        super().__init__(jid, password)
 
         # Check for the current song every 5 seconds.
         self.schedule('Check Current Tune', 5, self._update_tune, repeat=True)

slixmpp/exceptions.py

@@ -77,7 +77,7 @@ class IqTimeout(XMPPError):
     """
 
     def __init__(self, iq):
-        super(IqTimeout, self).__init__(
+        super().__init__(
                 condition='remote-server-timeout',
                 etype='cancel')
 
@@ -94,7 +94,7 @@ class IqError(XMPPError):
     """
 
     def __init__(self, iq):
-        super(IqError, self).__init__(
+        super().__init__(
                 condition=iq['error']['condition'],
                 text=iq['error']['text'],
                 etype=iq['error']['type'])

slixmpp/plugins/base.py

@@ -308,7 +308,7 @@ class BasePlugin(object):
         if key in self.default_config:
             self.config[key] = value
         else:
-            super(BasePlugin, self).__setattr__(key, value)
+            super().__setattr__(key, value)
 
     def _init(self):
         """Initialize plugin state, such as registering event handlers.

slixmpp/plugins/xep_0054/stanza.py

@@ -127,7 +127,7 @@ class Telephone(ElementBase):
                            'ISDN', 'PCS', 'PREF'])
 
     def setup(self, xml=None):
-        super(Telephone, self).setup(xml=xml)
+        super().setup(xml=xml)
         ## this blanks out numbers received from server
         ##self._set_sub_text('NUMBER', '', keep=True)