Commit Briefs
add a -q option to tests for quiet output and use it for 'make regress'
Previous default output remains when test cases are run individually. ok tracey
add submodule tests
ok semarie
use get_worktree_paths_from_argv consistently; improves add/rm edge cases
Double 'got rm' becomes a no-op like double 'got add' already is, and 'got add' of an already staged file is now an error.
got: support adding multiple files at a time
make adding files already in the file-index not a fatal error