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

modules/minutes20/pages/simple.py

@@ -20,6 +20,7 @@
 
 from weboob.tools.capabilities.messages.genericArticle import GenericNewsPage
 
+
 class SimplePage(GenericNewsPage):
     "ArticlePage object for minutes20"
     def on_loaded(self):
@@ -27,4 +28,3 @@ class SimplePage(GenericNewsPage):
         self.element_title_selector = "h1"
         self.element_author_selector = "div.mna-signature"
         self.element_body_selector = "div.mna-body"
-