t / t4013 / diff.diff-tree_--cc_--stat_--summary_masteron commit show_ref(): remove unused "flag" and "cb_data" arguments (bc98201)
   1$ git diff-tree --cc --stat --summary master
   259d314ad6f356dd08601a4cd5e530381da3e3c64
   3 dir/sub |    2 ++
   4 file0   |    3 +++
   5 2 files changed, 5 insertions(+), 0 deletions(-)
   6$