Apply suggestions from code review

Co-authored-by: Farzad Hayat <[email protected]>

Author: MitchC1999

modules/ROOT/pages/comments-with-mentions.adoc

@@ -1,7 +1,7 @@
 = Configuring the Comments plugin with the Mentions plugin
 :navtitle: Comments with Mentions
 :description: Information on configuring the Comments plugin with the Mentions plugin.
-:keywords: comments, commenting, tinycomments, mentions, 
+:keywords: comments, commenting, tinycomments, mentions
 :pluginname: Comments
 :plugincode: comments