2.11
test/unit: sort files included in dist
*: avoid more errors in nounset mode
test/_expand: port remaining test cases to pytest+pexpect
test: simplify completion parsing
*: format Python code with black
_init_completion: fix unassigned redirect completion in nounset mode
test: generalize check whether we're being run in a container
_included_ssh_config_files: support globs
_longopt: exclude too many dashes, allow underscores, require ends with alnum
_parse_help: look for long options somewhat more eagerly
test: add isort to pre-commit, run it
_xinetd_services: look up from $BASHCOMP_XINETDDIR, add some unit tests