[PATCH] view: decode In-Reply-To comments added by Gnus

[Eric Wong]

I noticed it in <https://yhbt.net/lore/git/xmqqr0ho9oi9.fsf@gitster.g/>
while scanning for something else.
---
 lib/PublicInbox/View.pm | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/lib/PublicInbox/View.pm b/lib/PublicInbox/View.pm
index 697535ff..2aee5f05 100644
--- a/lib/PublicInbox/View.pm
+++ b/lib/PublicInbox/View.pm
@@ -744,7 +744,11 @@ href="d/">diff</a>)</pre><pre>];
        }
        my @irt = $eml->header_raw('In-Reply-To');
        my $refs;
-       if (!@irt) {
+       if (@irt) { # ("so-and-so's message of $DATE") added by Gnus:
+               for (grep(/=\?/, @irt)) {
+                       s/(=\?.*)\z/PublicInbox::Eml::mhdr_decode $1/se;
+               }
+       } else {
                $refs = references($eml);
                $irt[0] = pop(@$refs) if scalar @$refs;
        }