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/mangareader/backend.py

@@ -19,8 +19,10 @@
 
 from weboob.tools.capabilities.gallery.genericcomicreader import GenericComicReaderBackend, DisplayPage
 
+
 __all__ = ['MangareaderBackend']
 
+
 class MangareaderBackend(GenericComicReaderBackend):
     NAME = 'mangareader'
     DESCRIPTION = 'MangaReader manga reading website'
@@ -31,4 +33,4 @@ class MangareaderBackend(GenericComicReaderBackend):
     ID_REGEXP = r'[^/]+/[^/]+'
     URL_REGEXP = r'.+mangareader.net/(%s).+' % ID_REGEXP
     ID_TO_URL = 'http://www.mangareader.net/%s'
-    PAGES = { r'http://.+\.mangareader.net/.+': DisplayPage } # oh well
+    PAGES = {r'http://.+\.mangareader.net/.+': DisplayPage}  # oh well

modules/mangareader/test.py

@@ -19,8 +19,9 @@
 
 from weboob.tools.capabilities.gallery.genericcomicreader import GenericComicReaderTest
 
+
 class MangareaderTest(GenericComicReaderTest):
     BACKEND = 'mangareader'
+
     def test_download(self):
         return self._test_download('glass-mask/3')
-