Merge branch 'ab/avoid-losing-exit-codes-in-tests'

Test clean-up.

* ab/avoid-losing-exit-codes-in-tests:
  tests: don't lose misc "git" exit codes
  tests: don't lose exit status with "test <op> $(git ...)"
  tests: don't lose "git" exit codes in "! ( git ... | grep )"
  tests: don't lose exit status with "(cd ...; test <op> $(git ...))"
  t/lib-patch-mode.sh: fix ignored exit codes
  auto-crlf tests: don't lose exit code in loops and outside tests

diff --cc t/lib-httpd.sh
Simple merge

diff --cc t/t1401-symbolic-ref.sh
Simple merge

diff --cc t/t3701-add-interactive.sh
Simple merge

diff --cc t/t5522-pull-symlink.sh
Simple merge

diff --cc t/t7402-submodule-rebase.sh
Simple merge

diff --cc t/t7504-commit-msg-hook.sh
Simple merge