The outputs of `each --help` and `cd --help` have obviously changed
in this PR.
i've simply run
```bash
> cargo run
```
to drop into the new `nushell` and clipped the output of the new
- `each --help | lines | length` from
`src/tests/test_engine.rs::help_works_with_missing_requirements`
- `cd --help | to html --html-color` from
`crates/nu-command/tests/format_conversions/html.rs::test_cd_html_color_flag_dark_false`
- `cd --help | to html --no-color` from
`crates/nu-command/tests/format_conversions/html.rs::test_no_color_flag`
11666bc715