python: Further pyupgrade changes.

Generated by pyupgrade --py3-plus --keep-percent-format.

Signed-off-by: Anders Kaseorg <anders@zulip.com>

zerver/migrations/0282_remove_zoom_video_chat.py

@@ -1,6 +1,4 @@
-# -*- coding: utf-8 -*-
 # Generated by Django 1.11.24 on 2019-09-24 00:15
-from __future__ import unicode_literals
 
 from django.db import migrations
 

zerver/webhooks/grafana/tests.py

@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 from zerver.lib.test_classes import WebhookTestCase
 
 

zerver/webhooks/grafana/view.py

@@ -8,9 +8,9 @@ from zerver.lib.request import REQ, has_request_variables
 from zerver.lib.response import json_success
 from zerver.models import UserProfile
 
-GRAFANA_TOPIC_TEMPLATE = u'{alert_title}'
+GRAFANA_TOPIC_TEMPLATE = '{alert_title}'
 
-GRAFANA_MESSAGE_TEMPLATE = u'[{rule_name}]({rule_url})\n\n{alert_message}{eval_matches}'
+GRAFANA_MESSAGE_TEMPLATE = '[{rule_name}]({rule_url})\n\n{alert_message}{eval_matches}'
 
 @api_key_only_webhook_view('Grafana')
 @has_request_variables

zerver/webhooks/sentry/view.py

@@ -225,7 +225,7 @@ def api_sentry_webhook(request: HttpRequest, user_profile: UserProfile,
         elif "issue" in data:
             subject, body = handle_issue_payload(payload["action"], data["issue"], payload["actor"])
         else:
-            raise UnexpectedWebhookEventType("Sentry", str((list(data.keys()))))
+            raise UnexpectedWebhookEventType("Sentry", str(list(data.keys())))
     else:
         subject, body = handle_deprecated_payload(payload)
 

zerver/webhooks/slack_incoming/tests.py

@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 from zerver.lib.test_classes import WebhookTestCase