help: Delete "Start a new topic" page in favor of "Starting a new topic".

- Deletes page, updates references, and adds URL redirect.

help/include/sidebar_index.md

@@ -127,7 +127,7 @@
 * [Add or remove users from a stream](/help/add-or-remove-users-from-a-stream)
 * [Pin a stream](/help/pin-a-stream)
 * [Change the color of a stream](/help/change-the-color-of-a-stream)
-* [Start a new topic](/help/start-a-new-topic)
+* [Start a new topic](/help/starting-a-new-topic)
 * [Rename a topic](/help/rename-a-topic)
 * [Resolve a topic](/help/resolve-a-topic)
 * [Move content to another topic](/help/move-content-to-another-topic)

help/start-a-new-topic.md

@@ -1,26 +0,0 @@
-# Start a new topic
-
-Topics are a lightweight tool to keep conversations organized. You should
-start a new topic whenever you're not replying to an existing message.
-
-## Start a new topic
-
-{start_tabs}
-
-1. Click on a stream in the left sidebar.
-
-1. Click **New topic** at the bottom of the app, or type <kbd>C</kbd>.
-
-{end_tabs}
-
-Don't worry about picking the perfect topic. The first 2-4 words that come
-to mind are great.
-
-Note that topics are not available for [direct messages](/help/direct-messages).
-If you find yourself wanting topics in a DM, we recommend
-[creating a private stream](/help/create-a-stream).
-
-## Related articles
-
-* [Rename a topic](/help/rename-a-topic)
-* [Require topics](/help/require-topics) for all stream messages

templates/corporate/development-community.md

@@ -40,7 +40,7 @@ feedback.
 - Send test messages to [#test
   here](https://chat.zulip.org/#narrow/stream/7-test-here) or as a PM
   to yourself to avoid disturbing others.
-- [Start a new topic](/help/start-a-new-topic) unless you’re replying
+- [Start a new topic](/help/starting-a-new-topic) unless you’re replying
   to an existing conversation. If you see a new user talking about
   something unrelated on an existing topic, [move the messages to an
   appropriate new topic](/help/move-content-to-another-topic).
@@ -82,7 +82,7 @@ feedback.
 # Where do I send my message?
 
 This section describes popular public streams on chat.zulip.org. Kick
-off the discussion by [starting a new topic](/help/start-a-new-topic)
+off the discussion by [starting a new topic](/help/starting-a-new-topic)
 in the appropriate stream! Don’t stress too much about picking the
 right place if you’re not sure; anyone in the community can edit a
 topic name, and [moderators](/help/roles-and-permissions) can [move a

zerver/lib/onboarding.py

@@ -309,7 +309,7 @@ def send_initial_realm_messages(realm: Realm) -> None:
         )
     ).format(
         default_notification_stream_name=Realm.DEFAULT_NOTIFICATION_STREAM_NAME,
-        start_topic_help_url="/help/start-a-new-topic",
+        start_topic_help_url="/help/starting-a-new-topic",
     )
 
     welcome_messages: List[Dict[str, str]] = [

zerver/lib/url_redirects.py

@@ -76,6 +76,7 @@ HELP_DOCUMENTATION_REDIRECTS: List[URLRedirect] = [
     URLRedirect("/help/web-public-streams", "/help/public-access-option"),
     URLRedirect("/help/starting-a-new-private-thread", "/help/starting-a-new-direct-message"),
     URLRedirect("/help/edit-or-delete-a-message", "/help/delete-a-message"),
+    URLRedirect("/help/start-a-new-topic", "/help/starting-a-new-topic"),
 ]
 
 LANDING_PAGE_REDIRECTS = [