space-age: sync tests

[ErikSchierboom]

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!

[tasxatzial]

This probably needs an update in the .tpl file (the last ~) ?

Also the space_age.clj file still has the old style function templates.

The functions all start with on- whereas in the tests they start with on_

[ErikSchierboom]

All updated

[tasxatzial]

Nice!