fix flake8

src/pretix/base/templatetags/icon.py

@@ -20,7 +20,7 @@
 # <https://www.gnu.org/licenses/>.
 #
 from django import template
-from django.utils.html import format_html, mark_safe
+from django.utils.html import format_html
 
 register = template.Library()
 

src/pretix/base/templatetags/textbubble.py

@@ -36,6 +36,7 @@ def textbubble(type, *args, **kwargs):
         )
     )
 
+
 @register.simple_tag
 def endtextbubble():
     return mark_safe('</span>')