Merge branch 'tc/last-modified-options-cleanup' into jch

The "-z" and "--max-depth" documentation (and implementation of
"-z") in the "git last-modified" command have been updated.

* tc/last-modified-options-cleanup:
  fixup! last-modified: document option --max-depth
  last-modified: document how depth is handled better
  last-modified: document option --max-depth
  last-modified: handle and document NUL termination

diff --cc builtin/last-modified.c
Simple merge