using
git format-patch --thread=shallow -o <foo>
and
git send-email --no-thread --no-chain-reply-to <foo>
duplicates the headers
In-Reply-To:
References:
Signed-off-by: Joe Perches <joe@perches.com>
`diff --git a/git-send-email.perl b/git-send-email.perl
index cccbf45..b57bce4 100755
--- a/git-send-email.perl
+++ b/git-send-email.perl
@@ -1137,7 +1137,7 @@ foreach my $t (@files) {
send_message();
# set up for the next message
- if ($chain_reply_to || !defined $reply_to || length($reply_to) == 0) {
+ if ($chain_reply_to && (!defined $reply_to || length($reply_to) == 0)) {
$reply_to = $message_id;
if (length $references > 0) {
$references .= "\n $message_id";