t / t4013 / diff.diff-tree_initial_modeon commit strbuf_readlink: use ssize_t (f3e76ed)
   1$ git diff-tree initial mode
   2:100644 100755 01e79c32a8c99c557f0757da7cb6d65b3414466d 01e79c32a8c99c557f0757da7cb6d65b3414466d M      file0
   3$