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/tools/parsers/__init__.py

@@ -24,34 +24,42 @@ import logging
 __all__ = ['get_parser', 'NoParserFound']
 
 
-class NoParserFound(Exception): pass
+class NoParserFound(Exception):
+    pass
+
 
 def load_lxml():
     from .lxmlparser import LxmlHtmlParser
     return LxmlHtmlParser
 
+
 def load_lxmlsoup():
     from .lxmlsoupparser import LxmlSoupParser
     return LxmlSoupParser
 
+
 def load_html5lib():
     from .html5libparser import Html5libParser
     return Html5libParser
 
+
 def load_elementtidy():
     from .elementtidyparser import ElementTidyParser
     return ElementTidyParser
 
+
 def load_builtin():
     from .htmlparser import HTMLParser
     return HTMLParser
 
+
 def load_json():
     # This parser doesn't read HTML, don't include it in the
     # preference_order default value below.
     from .jsonparser import JsonParser
     return JsonParser
 
+
 def get_parser(preference_order=('lxml', 'lxmlsoup')):
     """
     Get a parser from a preference order list.