Sync problem-specs tests

[BNAndras]

Related to #2847.

I left simple-linked-list alone since that's a more involved sync thanks to the new set of canonical tests. Mark as tiny please

[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]

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