send-email: fix non-threaded mails

diff --git a/t/t4013/diff.diff-tree_--cc_--stat_--summary_master b/t/t4013/diff.diff-tree_--cc_--stat_--summary_master
index 712ffd2d896bc6bf946da4d9b07a4a9735b8452c..cc6eb3b3d50f2d620df7116bf64992a4dd42b736 100644 (file)
--- a/t/t4013/diff.diff-tree_--cc_--stat_--summary_master
+++ b/t/t4013/diff.diff-tree_--cc_--stat_--summary_master
@@ -1,5 +1,5 @@
 $ git diff-tree --cc --stat --summary master
-176b998f5d647cbd77a9d8acf4531e930754d16d
+59d314ad6f356dd08601a4cd5e530381da3e3c64
  dir/sub |    2 ++
  file0   |    3 +++
  2 files changed, 5 insertions(+), 0 deletions(-)