Update MessagePoster topic title docs

This limitation was for Flow, which now has slightly expanded support.
As far as I know, there are no MessagePoster implementations other than
wikitext and Flow.

Change-Id: Ia0eaeade693f632aa6b9fb9e9f73c41360d5cadf

diff --git a/resources/src/mediawiki.messagePoster/mediawiki.messagePoster.MessagePoster.js b/resources/src/mediawiki.messagePoster/mediawiki.messagePoster.MessagePoster.js
index 113fb00..c51a07a 100644 (file)
--- a/resources/src/mediawiki.messagePoster/mediawiki.messagePoster.MessagePoster.js
+++ b/resources/src/mediawiki.messagePoster/mediawiki.messagePoster.MessagePoster.js
@@ -17,7 +17,9 @@
         * Post a message (with subject and body) to a talk page.
         *
         * @abstract
-        * @param {string} subject Subject/topic title; plaintext only (no wikitext or HTML)
+        * @param {string} subject Subject/topic title.  The amount of wikitext supported is
+        *   implementation-specific. It is recommended to only use basic wikilink syntax for
+        *   maximum compatibility.
         * @param {string} body Body, as wikitext.  Signature code will automatically be added
         *   by MessagePosters that require one, unless the message already contains the string
         *   ~~~.