python: Fix string literal concatenation mistakes.

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

analytics/management/commands/update_analytics_counts.py

@@ -23,7 +23,7 @@ class Command(BaseCommand):
 
     def add_arguments(self, parser: ArgumentParser) -> None:
         parser.add_argument('--time', '-t',
-                            help='Update stat tables from current state to'
+                            help='Update stat tables from current state to '
                                  '--time. Defaults to the current time.',
                             default=timezone_now().isoformat())
         parser.add_argument('--utc',

zerver/middleware.py

@@ -100,7 +100,7 @@ def is_slow_query(time_delta: float, path: str) -> bool:
     return True
 
 statsd_blacklisted_requests = [
-    'do_confirm', 'signup_send_confirm', 'new_realm_send_confirm,'
+    'do_confirm', 'signup_send_confirm', 'new_realm_send_confirm',
     'eventslast_event_id', 'webreq.content', 'avatar', 'user_uploads',
     'password.reset', 'static', 'json.bots', 'json.users', 'json.streams',
     'accounts.unsubscribe', 'apple-touch-icon', 'emoji', 'json.bots',

zerver/webhooks/pingdom/view.py

@@ -25,7 +25,7 @@ DESC_TEMPLATE = """
 
 SUPPORTED_CHECK_TYPES = (
     'HTTP',
-    'HTTP_CUSTOM'
+    'HTTP_CUSTOM',
     'HTTPS',
     'SMTP',
     'POP3',