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

[Eric Wong <e@80x24.org>]

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;
 	}