Improve errors when a non-vector is passed to expect_vector.
#2229
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The `expect_vector` function delegates most of its logic to `vctrs::vec_assert`, which can throw one of two errors, `vctrs_error_assert` and `vctrs_error_scalar_type`. Only the former one was being handled, not the latter. This doesn't affect the behaviour of tests much, but it produces sub-par error messages and causes failing tests to terminate immediately rather than recording the error and continuing like other assertions do.
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The
expect_vectorfunction delegates most of its logic tovctrs::vec_assert, which can throw one of two errors,vctrs_error_assertandvctrs_error_scalar_type.Only the former one was being handled, not the latter. This doesn't affect the behaviour of tests much, but it produces sub-par error messages and causes failing tests to terminate immediately rather than recording the error and continuing like other assertions do.
Fixes #2224