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/core/backendscfg.py

@@ -28,9 +28,11 @@ from logging import warning
 
 __all__ = ['BackendsConfig', 'BackendAlreadyExists']
 
+
 class BackendAlreadyExists(Exception):
     pass
 
+
 class BackendsConfig(object):
     class WrongPermissions(Exception):
         pass
@@ -41,13 +43,13 @@ class BackendsConfig(object):
             mode = os.stat(confpath).st_mode
         except OSError:
             if sys.platform == 'win32':
-                fptr = open(confpath,'w')
+                fptr = open(confpath, 'w')
                 fptr.close()
             else:
                 try:
                     os.mknod(confpath, 0600)
                 except OSError:
-                    fptr = open(confpath,'w')
+                    fptr = open(confpath, 'w')
                     fptr.close()
                     os.chmod(confpath, 0600)
         else:
@@ -129,5 +131,3 @@ class BackendsConfig(object):
         with open(self.confpath, 'w') as f:
             config.write(f)
         return True
-
-