Remove useless trailing \
Remove trailing spaces
Add missing empty lines

autopep8 -ir -j2 --select=E301,E302,E502,W291,W293,W391 .

Diff quickly checked.

This is recommended by Debian.
closes #618

 - error callback for loadHistory, to make the reload button enabled again after an error
 - remove descriptionEdit's placeholder (for compatibilty with earlier versions of Qt)
 - add placeholder text to descriptionEdit if supported by the user's version of Qt
 - set contentEdit read-only while loading a new page
 - saveButton was still showing "Saving" after saving had failed

 - added doc strings to every method
 - showPreview -> loadPreview (for consistency)                                                        - _loadPage_cb -> _loadedPage (same for savePage)                                                     - _loadPage_eb -> _errorLoadPage (same for savePage)
 - try to limit lines to 79 columns

Clément Schreiner authored Mar 23, 2012 and Romain Bignon committed Mar 24, 2012

 - the contentEdit widget is ReadOnly before a page has been loaded
 - the saveButton widget stays disabled after the page has been saved

 - The 'save' button is disabled and shows 'No changes' at first. Editing contentEdit's text
enables the button and makes it show 'Save'.
 - The 'save' button is disabled and shows 'Saving...' when the page is being saved, and stays
disabled until contentEdit's text has been changed again.
 - The 'save' button shows 'Saved' once the page has been successfully saved. fixes #560
 - contentEdit is readonly when the page is being saved

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

The preview text displayed in the previewEdit widget was the text of
the content opened from the wiki, and not the text entered by the user
in the contentEdit widget.

 - content preview's html code is now cleaner
 - ICapContent.preview_content() renamed to ICapContent.get_content_preview()
 - tab "preview" was shown first when starting qwebcontentedit. Fixed.

Status: ugly GUI, editing and saving a page mostly working,
preview support in progress