fix permalink to comments

This commit was sponsored by Thomas May.

CHANGELOG

@@ -11,6 +11,7 @@ ikiwiki (3.20180312) UNRELEASED; urgency=medium
   * aggregate: Fix aggregation of posts without a title.
     Thanks, Alexandre Oliva
   * poll: Added postlink and posttrail options for better multi-page polls.
+  * Fix permalink to comments.
 
  -- Simon McVittie <smcv@debian.org>  Wed, 16 May 2018 13:09:27 +0100
 

IkiWiki/Plugin/comments.pm

@@ -265,7 +265,7 @@ sub preprocess {
 		$pagestate{$page}{meta}{title} = decode_entities($params{subject});
 	}
 
-	if ($params{page} =~ m/\/\Q$config{comments_pagename}\E\d+_/) {
+	if ($params{page} =~ m/\/\Q$config{comments_pagename}\E\d+/) {
 		$pagestate{$page}{meta}{permalink} = urlto(IkiWiki::dirname($params{page})).
 			"#".page_to_id($params{page});
 	}