Stop instantiating context objects as it is deprecated

src/pretix/base/views/errors.py

@@ -1,13 +1,12 @@
 from django.http import HttpResponseForbidden
 from django.middleware.csrf import REASON_NO_CSRF_COOKIE, REASON_NO_REFERER
-from django.template import Context
 from django.template.loader import get_template
 from django.utils.translation import ugettext as _
 
 
 def csrf_failure(request, reason=""):
     t = get_template('csrffail.html')
-    c = Context({
+    c = {
         'reason': reason,
         'no_referer': reason == REASON_NO_REFERER,
         'no_referer1': _(
@@ -29,5 +28,5 @@ def csrf_failure(request, reason=""):
             "If you have configured your browser to disable cookies, please "
             "re-enable them, at least for this site, or for 'same-origin' "
             "requests."),
-    })
+    }
     return HttpResponseForbidden(t.render(c), content_type='text/html')

src/pretix/plugins/banktransfer/signals.py

@@ -1,6 +1,5 @@
 from django.core.urlresolvers import resolve, reverse
 from django.dispatch import receiver
-from django.template import Context
 from django.template.loader import get_template
 from django.utils.translation import ugettext_lazy as _
 
@@ -38,7 +37,6 @@ def html_head_presale(sender, request=None, **kwargs):
     url = resolve(request.path_info)
     if url.namespace == 'plugins:banktransfer':
         template = get_template('pretixplugins/banktransfer/control_head.html')
-        ctx = Context({})
-        return template.render(ctx)
+        return template.render({})
     else:
         return ""

src/pretix/plugins/pretixdroid/signals.py

@@ -1,6 +1,5 @@
 from django.core.urlresolvers import resolve, reverse
 from django.dispatch import receiver
-from django.template import Context
 from django.template.loader import get_template
 from django.utils.translation import ugettext_lazy as _
 
@@ -30,7 +29,6 @@ def html_head_presale(sender, request=None, **kwargs):
     url = resolve(request.path_info)
     if url.namespace == 'plugins:pretixdroid':
         template = get_template('pretixplugins/pretixdroid/control_head.html')
-        ctx = Context({})
-        return template.render(ctx)
+        return template.render({})
     else:
         return ""

src/pretix/plugins/stripe/signals.py

@@ -2,7 +2,6 @@ import json
 
 from django.core.urlresolvers import resolve
 from django.dispatch import receiver
-from django.template import Context
 from django.template.loader import get_template
 from django.utils.translation import ugettext_lazy as _
 
@@ -25,7 +24,7 @@ def html_head_presale(sender, request=None, **kwargs):
     url = resolve(request.path_info)
     if provider.is_enabled and ("checkout" in url.url_name or "order.pay" in url.url_name):
         template = get_template('pretixplugins/stripe/presale_head.html')
-        ctx = Context({'event': sender, 'settings': provider.settings})
+        ctx = {'event': sender, 'settings': provider.settings}
         return template.render(ctx)
     else:
         return ""