diff --git a/jdav_web/members/admin.py b/jdav_web/members/admin.py
index b417ffc..2bfbe9d 100644
--- a/jdav_web/members/admin.py
+++ b/jdav_web/members/admin.py
@@ -802,40 +802,38 @@ class GroupAdmin(CommonAdminMixin, admin.ModelAdmin):
     list_display = ('name', 'year_from', 'year_to')
     inlines = [RegistrationPasswordInline, PermissionOnGroupInline]
     search_fields = ('name',)
-    
+
     def get_urls(self):
         urls = super().get_urls()
-        
+
         def wrap(view):
             def wrapper(*args, **kwargs):
                 return self.admin_site.admin_view(view)(*args, **kwargs)
 
             wrapper.model_admin = self
             return update_wrapper(wrapper, view)
-        
+
         custom_urls = [
             path('action/', self.action_view, name='members_group_action'),
         ]
         return custom_urls + urls
-    
+
     def action_view(self, request):
         if "group_overview" in request.POST:
             return self.group_overview(request)
 
     def group_overview(self, request):
-        
+
         if not request.user.has_perm('members.view_group'):
             messages.error(request,
                 _("You are not allowed to create a group overview."))
             return HttpResponseRedirect(reverse('admin:%s_%s_changelist' % (self.opts.app_label, self.opts.model_name)))
-        
+
         ensure_media_dir()
         filename = generate_group_overview(all_groups=self.model.objects.all())
         response = serve_media(filename=filename, content_type='application/xlsx')
 
         return response
-    
-    
 
 
 class ActivityCategoryAdmin(admin.ModelAdmin):
diff --git a/jdav_web/members/excel.py b/jdav_web/members/excel.py
index 22d4b3f..6fa8ff7 100644
--- a/jdav_web/members/excel.py
+++ b/jdav_web/members/excel.py
@@ -7,11 +7,11 @@ from .models import WEEKDAYS
 
 def generate_group_overview(all_groups, limit_to_public = True):
     """
-    Creates an Excel Sheet with an overview of all the groups, their dates, times, age range and 
+    Creates an Excel Sheet with an overview of all the groups, their dates, times, age range and
     number of members, etc.
-    
+
     arguments:
-    limit_to_public (optional, default is True): If False, all groups are returned in the overview, 
+    limit_to_public (optional, default is True): If False, all groups are returned in the overview,
     including technical ones. If True, only groups with the flag "show_on_website" are returned.
 
     """
@@ -23,7 +23,7 @@ def generate_group_overview(all_groups, limit_to_public = True):
     title = workbook.add_format({'bold': True, 'font_size': 16, 'align': 'center'})
     right = workbook.add_format({'bold': True, 'align': 'right'})
     worksheet = workbook.add_worksheet()
-    
+
     worksheet.merge_range(0, 0, 0, 6, f"Gruppenübersicht JDAV {settings.SEKTION}", title)
     row = 1
     worksheet.write(row, 0, "Gruppe", bold)
@@ -46,7 +46,7 @@ def generate_group_overview(all_groups, limit_to_public = True):
         tn_count = group.member_set.count() - yl_count
         members = f"JG {group.year_from} - {group.year_to}"
         leaders = f"{', '.join([yl.name for yl in group.leiters.all()])}"
-        
+
         worksheet.write(row, 0, group.name, default)
         worksheet.write(row, 1, wd, default)
         worksheet.write(row, 2, times, default)
@@ -54,7 +54,7 @@ def generate_group_overview(all_groups, limit_to_public = True):
         worksheet.write(row, 4, tn_count, default)
         worksheet.write(row, 5, yl_count, default)
         worksheet.write(row, 6, leaders, default)
-    
+
     worksheet.write(row+2, 6, f"Stand: {today}", right)
     # set column width
     worksheet.set_column_pixels(0, 0, 100)