notifications: Shorten string for redacted content.

Replace the long string for organisations that have notification
body/content disabled (settings.PUSH_NOTIFICATION_REDACT_CONTENT
set to true) with "New message".

This allows more of the limited space on the mobile device screen to
be used for additional messages rather than this verbose content.

Fixes #29152

zerver/lib/push_notifications.py

@@ -922,13 +922,7 @@ def get_mobile_push_content(rendered_content: str) -> str:
         return plain_text
 
     if settings.PUSH_NOTIFICATION_REDACT_CONTENT:
-        return (
-            "*"
-            + _(
-                "This organization has disabled including message content in mobile push notifications"
-            )
-            + "*"
-        )
+        return _("New message")
 
     elem = lxml.html.fragment_fromstring(rendered_content, create_parent=True)
     change_katex_to_raw_latex(elem)

zerver/tests/test_push_notifications.py

@@ -4109,7 +4109,7 @@ class TestGetAPNsPayload(PushNotificationTest):
             "alert": {
                 "title": "Cordelia, Lear's daughter, King Hamlet, Othello, the Moor of Venice",
                 "subtitle": "King Hamlet:",
-                "body": "*This organization has disabled including message content in mobile push notifications*",
+                "body": "New message",
             },
             "sound": "default",
             "badge": 0,
@@ -4305,7 +4305,7 @@ class TestGetGCMPayload(PushNotificationTest):
                 "event": "message",
                 "zulip_message_id": message.id,
                 "time": datetime_to_timestamp(message.date_sent),
-                "content": "*This organization has disabled including message content in mobile push notifications*",
+                "content": "New message",
                 "content_truncated": False,
                 "server": settings.EXTERNAL_HOST,
                 "realm_id": hamlet.realm.id,