Merge branch 'master' of github.com:git/git into git-po-master

* 'master' of github.com:git/git: (27 commits)
  Git 2.26-rc1
  remote-curl: show progress for fetches over dumb HTTP
  show_one_mergetag: print non-parent in hex form.
  config.mak.dev: re-enable -Wformat-zero-length
  rebase-interactive.c: silence format-zero-length warnings
  mingw: workaround for hangs when sending STDIN
  t6020: new test with interleaved lexicographic ordering of directories
  t6022, t6046: test expected behavior instead of testing a proxy for it
  t3035: prefer test_must_fail to bash negation for git commands
  t6020, t6022, t6035: update merge tests to use test helper functions
  t602[1236], t6034: modernize test formatting
  merge-recursive: apply collision handling unification to recursive case
  completion: add diff --color-moved[-ws]
  t1050: replace test -f with test_path_is_file
  am: support --show-current-patch=diff to retrieve .git/rebase-apply/patch
  am: support --show-current-patch=raw as a synonym for--show-current-patch
  am: convert "resume" variable to a struct
  parse-options: convert "command mode" to a flag
  parse-options: add testcases for OPT_CMDMODE()
  stash push: support the --pathspec-from-file option
  ...