add missing exercies for reverse-string #364

[kmarker1101]

No description provided.

[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!

[kmarker1101]

This solution works, but it makes the exercise much more difficult. This may be a case where we don't want to add the missing tests.

[BNAndras]

We could raise the difficulty or not include the tests. Since Emacs is a text editor, it makes sense to keep the tests though so students get practice handling text. Let’s bump the difficulty to medium (anywhere between 4 and 6). This is a significant addition so I would add yourself as a contributor to the exercise config.

[kmarker1101]

done. Thanks