[PATCH] fix git format-patch --cc=<email> format

If there are multiple --cc=<email> arguments, git format-patch will generate
patches with cc lines like:
  Cc: <email>,
      <email>
which git send-email fails to parse.
git send-email only accept formats like:
  Cc: <email>
  Cc: <email>
So change git format-patch to generate patches in a proper format.

Signed-off-by: Peng Tao <redacted>
---
 builtin-log.c |    6 +-----
 1 files changed, 1 insertions(+), 5 deletions(-)

diff --git a/builtin-log.c b/builtin-log.c
index 60f8dd8..22bb6b6 100644
--- a/builtin-log.c
+++ b/builtin-log.c

@@ -907,13 +907,9 @@ int cmd_format_patch(int argc, const char **argv, const char *prefix)
 	}
 
 	if (extra_cc_nr)
-		strbuf_addstr(&buf, "Cc: ");
 	for (i = 0; i < extra_cc_nr; i++) {
-		if (i)
-			strbuf_addstr(&buf, "    ");
+		strbuf_addstr(&buf, "Cc: ");
 		strbuf_addstr(&buf, extra_cc[i]);
-		if (i + 1 < extra_cc_nr)
-			strbuf_addch(&buf, ',');
 		strbuf_addch(&buf, '\n');
 	}