Fix pylint errors

- bad-mcs-method-argument
- trailing-newlines
- no-self-argument

gajim/cell_renderer_image.py

@@ -42,11 +42,11 @@ class CellRendererImage(Gtk.CellRendererPixbuf):
     def do_get_property(self, pspec):
         return getattr(self, pspec.name)
 
-    def do_activate(event, widget, path, bg_area, cell_area, flags):
+    def do_activate(self, *args, **kwargs):
         """Renderers cannot be activated; always return True."""
         return True
 
-    def do_editing_started(event, widget, path, fb_area, cell_area, flags):
+    def do_editing_started(self, *args, **kwargs):
         """Renderers cannot be edited; always return None."""
         return None
 

gajim/command_system/dispatcher.py

@@ -104,32 +104,32 @@ def list_commands(host):
 
 class Dispatchable(type):
     # pylint: disable=no-value-for-parameter
-    def __init__(self, name, bases, namespace):
-        parents = super(Dispatchable, self)
+    def __init__(cls, name, bases, namespace):
+        parents = super(Dispatchable, cls)
         parents.__init__(name, bases, namespace)
         if not is_root(namespace):
-            self.dispatch()
+            cls.dispatch()
 
-    def dispatch(self):
-        if self.AUTOMATIC:
-            self.enable()
+    def dispatch(cls):
+        if cls.AUTOMATIC:
+            cls.enable()
 
 
 class Host(Dispatchable):
 
-    def enable(self):
-        add_host(self)
+    def enable(cls):
+        add_host(cls)
 
-    def disable(self):
-        remove_host(self)
+    def disable(cls):
+        remove_host(cls)
 
 
 class Container(Dispatchable):
 
-    def enable(self):
-        add_container(self)
-        add_commands(self)
+    def enable(cls):
+        add_container(cls)
+        add_commands(cls)
 
-    def disable(self):
-        remove_commands(self)
-        remove_container(self)
+    def disable(cls):
+        remove_commands(cls)
+        remove_container(cls)

gajim/command_system/implementation/standard.py

@@ -400,4 +400,3 @@ class StandardGroupChatCommands(CommandContainer):
             raise CommandError(_('Command is not supported for zeroconf accounts'))
         gc_c = app.contacts.get_gc_contact(self.account, self.room_jid, nick)
         app.connections[self.account].get_module('Ping').send_ping(gc_c)
-