Merge branch 'am/test-pathspec-f-f-error-cases'

More tests.

* am/test-pathspec-f-f-error-cases:
  t: add tests for error conditions with --pathspec-from-file

diff --cc t/t2026-checkout-pathspec-file.sh
Simple merge

diff --cc t/t2072-restore-pathspec-file.sh
Simple merge

diff --cc t/t3704-add-pathspec-file.sh
Simple merge

diff --cc t/t7107-reset-pathspec-file.sh
Simple merge

diff --cc t/t7526-commit-pathspec-file.sh
Simple merge