Merge branch 'mf/format-patch-commit-list-format'

Improve the recently introduced `git format-patch --commit-list-format` (formerly `--cover-letter-format`) option, including a new "modern" preset and better CLI ergonomics. * mf/format-patch-commit-list-format: format-patch: --commit-list-format without prefix format-patch: add preset for --commit-list-format format-patch: wrap generate_commit_list_cover() format.commitListFormat: strip meaning from empty docs/pretty-formats: add %(count) and %(total) format-patch: rename --cover-letter-format option format-patch: refactor generate_commit_list_cover pretty.c: better die message %(count) and %(total)