forth: sync

[senekor]

[no important files changed]

[github-actions]

This PR touches files which potentially affect the outcome of the tests of an exercise. This will cause all students' solutions to affected exercises to be re-tested.

If this PR does not affect the result of the test (or, for example, adds an edge case that is not worth rerunning all tests for), please add the following to the merge-commit message which will stops student's tests from re-running. Please copy-paste to avoid typos.

[no important files changed]

For more information, refer to the documentation. If you are unsure whether to add the message or not, please ping @exercism/maintainers-admin in a comment. Thank you!

[senekor]

The two test files are generally quite different, although there are a couple more tests in the new version. I glossed over most of it and I couldn't find anything specific that's missing in the new test suite. But I honestly wasn't that thorough, it's a big diff. I added the "no important files changed" tag because I'm not aware of any new edge case that's supposed to be covered.