From 7dc3fe1a7ac71cb1907b2d02ae81f90a01f6fd87 Mon Sep 17 00:00:00 2001
From: Ken'ichi Fukamachi <fukachan@fml.org>
Date: Mon, 10 Sep 2018 19:15:20 +0900
Subject: handle subject_tag with % (e.g. %d, %05d) or not correctly to avoid
 warning.

---
 fml/lib/FML/Header.pm | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fml/lib/FML/Header.pm b/fml/lib/FML/Header.pm
index 5b8f6a0d..386f9a87 100644
--- a/fml/lib/FML/Header.pm
+++ b/fml/lib/FML/Header.pm
@@ -475,7 +475,7 @@ sub rewrite_article_subject_tag
     $sbj->delete_dup_reply_tag() if $sbj->has_reply_tag();
 
     # add(prepend) the rewrited tag with mime encoding.
-    my $new_tag = sprintf($tag, $rw_args->{ id });
+    my $new_tag = $tag =~ /\%/ ? sprintf($tag, $rw_args->{ id }) : $tag;
     my $new_sbj = sprintf("%s %s", $new_tag, $sbj->as_str());
 
     # update object.
-- 
cgit v1.2.1