Diverse Code Cleanups

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

mahjong_ranking/admin.py

@@ -1,10 +1,10 @@
 # -*- encoding: utf-8 -*-
 
-'''
+"""
 Created on 19.09.2011
 
 @author: christian
-'''
+"""
 # import stuff we need from django
 from django.contrib import admin
 from . import models, set_dirty
@@ -45,7 +45,6 @@ class EventRankingAdmin(admin.ModelAdmin):
     list_display = ('placement', 'user', 'event', 'avg_placement', 'avg_score',
         'hanchan_count', 'good_hanchans', 'won_hanchans', 'dirty')
     list_display_links = ('user',)
-    list_filter = ('event',)
     actions = [recalculate]