integrations/trello-plugin: Migrate docs to Markdown.

templates/zerver/integrations/trello-plugin.html

@@ -1,30 +0,0 @@
-<p>
-    This legacy integration for Trello works by running a script
-    that communicates with the Trello API in a cron job. We
-    recommend <a href="#trello">the new Trello webhook
-    integration</a> (which will eventually replace this entirely).
-    Please
-    <a href="https://github.com/zulip/zulip/issues/new">
-        report any issues
-    </a>
-    which cause you to prefer this integration over
-    the webhook integration.
-</p>
-
-<p>
-    First, create the stream you'd like to use for Trello notifications,
-    and subscribe all interested parties to this stream. We recommend the
-    name <code>trello</code>.
-</p>
-
-<p>
-    Next, download a copy
-    of <a href="https://github.com/zulip/trello-to-zulip">trello-to-zulip</a>
-    and follow the instructions in <code>README.md</code>. When you
-    make changes in Trello, they will be reflected in Zulip:
-</p>
-
-<img class="screenshot" src="/static/images/integrations/trello/002.png"/>
-<p>
-    <small>Thanks to Nathan from FoundationDB for submitting this integration!</small>
-</p>

templates/zerver/integrations/trello-plugin.md

@@ -0,0 +1,19 @@
+This legacy integration for Trello works by running a script that
+communicates with the Trello API in a cron job. We recommend
+[the new Trello webhook integration](#trello) (which will
+eventually replace this entirely). Please
+[report any issues](https://github.com/zulip/zulip/issues/new)
+which cause you to prefer this integration over the webhook
+integration.
+
+{!create-stream.md!}
+
+Next, download a copy of
+[trello-to-zulip](https://github.com/zulip/trello-to-zulip)
+and follow the instructions in `README.md`.
+
+{!congrats.md!}
+
+![](/static/images/integrations/trello/002.png)
+
+##### Thanks to Nathan from FoundationDB for submitting this integration!

zerver/lib/integrations.py

@@ -313,7 +313,8 @@ INTEGRATIONS = {
         logo='static/images/integrations/logos/trello.svg',
         secondary_line_text='(legacy)',
         display_name='Trello',
-        doc='zerver/integrations/trello-plugin.html'
+        doc='zerver/integrations/trello-plugin.md',
+        stream_name='trello',
     ),
     'twitter': Integration('twitter', 'twitter', doc='zerver/integrations/twitter.md'),