Diverse Code Cleanups

*Code wurde PEP-8 gerecht formatiert
* Kleine Fehler die der PyCharm Inspector beanstandet wurden korrigiert

content/context_processors.py

@@ -1,9 +1,9 @@
 # -*- encoding: UTF-8 -*-
-'''
+"""
 Created on 30.09.2011
 
 @author: christian
-'''
+"""
 from . import models
 from django.core.cache import cache
 
@@ -16,7 +16,7 @@ def content_menus(request):
     # erzeuge das Top-Level Menü
     top_menu_items = []
     top_level_pages = cache.get('top_level_pages')
-    if top_level_pages == None:
+    if top_level_pages is None:
         top_level_pages = models.Page.objects.filter(parent=None)
         top_level_pages = top_level_pages.exclude(slug='index')
         top_level_pages = top_level_pages.order_by('position')
@@ -31,7 +31,7 @@ def content_menus(request):
 
     # Entdecke die aktuell geöffnete Seite
     all_pages = cache.get('all_pages')
-    if all_pages == None:
+    if all_pages is None:
         all_pages = models.Page.objects.values_list('path', 'id')
         all_pages = dict((path, page_id) for path, page_id in all_pages)
         cache.set('all_pages', all_pages, 360)