diff --git a/rhodecode/templates/changeset/changeset_comment_block.html b/rhodecode/templates/changeset/changeset_comment_block.html
--- a/rhodecode/templates/changeset/changeset_comment_block.html
+++ b/rhodecode/templates/changeset/changeset_comment_block.html
@@ -1,2 +1,4 @@
+## this is a dummy html file for partial rendering on server and sending
+## generated output via ajax after comment submit
 <%namespace name="comment" file="/changeset/changeset_file_comment.html"/>
 ${comment.comment_block(c.co)}