PEP8 style fixes and other small style fixes

I used autopep8 on some files and did carefully check the changes.
I ignored E501,E302,E231,E225,E222,E221,E241,E203 in my search, and at
least E501 on any autopep8 run.

Other style fixes not related to PEP8:
* Only use new-style classes. I don't think the usage of old-style
  classes was voluntary. Old-style classes are removed in Python 3.
* Convert an if/else to a one-liner in mediawiki, change docstring style
  change to a comment something that wasn't really appropriate for a
  docstring.
* Unneeded first if condition in meteofrance

weboob/applications/qwebcontentedit/qwebcontentedit.py

@@ -22,6 +22,7 @@ from weboob.capabilities.content import ICapContent
 
 from .main_window import MainWindow
 
+
 class QWebContentEdit(QtApplication):
     APPNAME = 'qwebcontentedit'
     VERSION = '0.b'
@@ -34,5 +35,3 @@ class QWebContentEdit(QtApplication):
         self.main_window = MainWindow(self.config, self.weboob)
         self.main_window.show()
         return self.weboob.loop()
-
-