python 3.5 compatibility

basetheme_bootstrap/views.py

@@ -126,7 +126,7 @@ def send_account_created(request, user, auto_active=False, next_page=None):
             'token': tokens.account_activation_token.make_token(user)
         })
         if next_page:
-            activation_link += f"?next={next_page}"
+            activation_link += "?next=" + next_page
         if auto_active:
             message = ugettext(
                 'Dear %(first_name)s %(last_name)s\n\n'

setup.py

@@ -7,7 +7,7 @@ readme = open('README.rst').read()
 
 setup(
     name='django-basetheme-bootstrap',
-    version='0.2.54',
+    version='0.2.55',
     description='Django Basetheme Bootstrap',
     long_description=readme,
     author='Bryan Brancotte',