t / t4013 / diff.noellipses-diff-tree_-c_--abbrev_masteron commit format-patch: make --base patch-id output stable (a8f6855)
   1$ git diff-tree -c --abbrev master
   259d314ad6f356dd08601a4cd5e530381da3e3c64
   3::100644 100644 100644 cead32e 7289e35 992913c MM       dir/sub
   4::100644 100644 100644 b414108 f4615da 10a8a9f MM       file0
   5$