[PATCH v2] send-email: only allow one address per body tag

[Johan Hovold <johan@kernel.org>]

Adding comments after a tag in the body is a common practise (e.g. in
the Linux kernel) and git-send-email has been supporting this for years
by removing any trailing cruft after the address.

After some recent changes, any trailing comment is now instead appended
to the recipient name (with some random white space inserted) resulting
in undesirable noise in the headers, for example:

CC: "# 3 . 3 . x : 1b9508f : sched : Rate-limit newidle" <stable@vger.kernel.org>

Revert to the earlier behaviour of discarding anything after the (first)
address in a tag while parsing the body.

Note that multiple addresses after are still allowed after a command
line switch (and in a CC header field).

Also note that --suppress-cc=self was never honoured when using multiple
addresses in a tag.

Fixes: b1c8a11c8024 ("send-email: allow multiple emails using --cc, --to
and --bcc")
Fixes: e3fdbcc8e164 ("parse_mailboxes: accept extra text after <...>
address")
Signed-off-by: Johan Hovold <johan@kernel.org>
---

v2:
 - update the cc-trailer test
 - amend commit message and mention the broken --suppress-cc=self


 git-send-email.perl   | 2 +-
 t/t9001-send-email.sh | 7 +++----
 2 files changed, 4 insertions(+), 5 deletions(-)

diff --git a/git-send-email.perl b/git-send-email.perl
index 068d60b3e698..eea0a517f71b 100755
--- a/git-send-email.perl
+++ b/git-send-email.perl
@@ -1563,7 +1563,7 @@ foreach my $t (@files) {
 	# Now parse the message body
 	while(<$fh>) {
 		$message .=  $_;
-		if (/^(Signed-off-by|Cc): (.*)$/i) {
+		if (/^(Signed-off-by|Cc): ([^>]*>?)/i) {
 			chomp;
 			my ($what, $c) = ($1, $2);
 			chomp $c;
diff --git a/t/t9001-send-email.sh b/t/t9001-send-email.sh
index 0f398dd1603d..60a80f60b268 100755
--- a/t/t9001-send-email.sh
+++ b/t/t9001-send-email.sh
@@ -148,7 +148,6 @@ cat >expected-cc <<\EOF
 !two@example.com!
 !three@example.com!
 !four@example.com!
-!five@example.com!
 EOF
 "
 
@@ -159,9 +158,9 @@ test_expect_success $PREREQ 'cc trailer with various syntax' '
 	Test Cc: trailers.
 
 	Cc: one@example.com
-	Cc: <two@example.com> # this is part of the name
-	Cc: <three@example.com>, <four@example.com> # not.five@example.com
-	Cc: "Some # Body" <five@example.com> [part.of.name.too]
+	Cc: <two@example.com> # trailing comments are ignored
+	Cc: <three@example.com>, <not.four@example.com> one address per line
+	Cc: "Some # Body" <four@example.com> [ <also.a.comment> ]
 	EOF
 	clean_fake_sendmail &&
 	git send-email -1 --to=recipient@example.com \
-- 
2.11.1