make the linter happy

Und täglich grüßt das Murmeltier ...

README.rst

@@ -1,5 +1,5 @@
 Pretalx: Broadcast Tools (and more)
-==========================
+===================================
 
 This is a plugin for `pretalx`_.
 

pretalx_broadcast_tools/forms.py

@@ -1,4 +1,4 @@
-from django.forms import BooleanField, CharField, Textarea, ChoiceField
+from django.forms import BooleanField, CharField, ChoiceField, Textarea
 from django.utils.translation import gettext_lazy as _
 from hierarkey.forms import HierarkeyForm
 from i18nfield.forms import I18nFormField, I18nFormMixin, I18nTextInput

pretalx_broadcast_tools/views.py

@@ -75,7 +75,8 @@ class BroadcastToolsEventInfoView(View):
                     self.request.event.settings.broadcast_tools_lower_thirds_no_talk_info
                 ),
                 "room-info": {
-                    "lower_info": self.request.event.settings.broadcast_tools_room_info_lower_content or '',
+                    "lower_info": self.request.event.settings.broadcast_tools_room_info_lower_content
+                    or "",
                 },
                 "slug": self.request.event.slug,
             },