[twitter] apply suggestions from code review

Co-authored-by: Mike Fährmann <mike_faehrmann@web.de>

docs/configuration.rst

@@ -2655,7 +2655,8 @@ Description
 extractor.twitter.syndication
 -----------------------------
 Type
-    ``bool`` or ``string``
+    * ``bool``
+    * ``string``
 Default
     ``false``
 Description
@@ -2664,9 +2665,9 @@ Description
     * ``false``: Skip age-restricted Tweets.
     * ``true``: Download using Twitter's syndication API.
     * ``"extended"``: Try to fetch Tweet metadata using the normal API
-    in addition to the syndication API. This requires additional HTTP
-    requests in some cases (e.g. when `retweets <extractor.twitter.retweets_>`_
-    is enabled).
+      in addition to the syndication API. This requires additional HTTP
+      requests in some cases (e.g. when `retweets <extractor.twitter.retweets_>`_
+      are enabled).
 
 
 extractor.twitter.logout