* fix: add "about" and "usage" for dir and vdir
* fix import
* revert changes on vdir. focus on dir first
* revert import on vdir
* add test
* Update en-US.ftl
* fix fmt
* revert vdir
* precommit
* tests/util: Fix documentation of UCommand::stderr_only and usage_error
* tests/util: Remove trimming from CmdResult::stdout_matches and stdout_does_not_match. Fix tests.
The tests are fixed to match the trailing newline instead of ignoring it.