Fix typo in "test_error_for_largest_if_min_more_than_max"

[anantone]

The two tests "test_error_for_smallest_if_min_more_than_max" and "test_error_for_largest_if_min_more_than_max" were both calling smallest. The latter now calls largest as advertised.

[github-actions]

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[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.

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[anantone]

This is affecting one of the tests, which at the present is only a duplicate of the previous one, due to a typo. In most cases, this should not change the results of the tests for individual students. Still, I'm unsure if [no important files changed]