Adapt test_ambiguities printing

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 91.66667% with 1 lines in your changes are missing coverage. Please review.

Project coverage is 75.03%. Comparing base (05c8eba) to head (268c1e8).

Files	Patch %	Lines
src/ambiguities.jl	91.66%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #281 +/- ## ========================================== - Coverage 75.06% 75.03% -0.04% ========================================== Files 11 11 Lines 762 761 -1 ========================================== - Hits 572 571 -1 Misses 190 190 ``` | [Flag](https://app.codecov.io/gh/JuliaTesting/Aqua.jl/pull/281/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=JuliaTesting) | Coverage Δ | | |---|---|---| | [unittests](https://app.codecov.io/gh/JuliaTesting/Aqua.jl/pull/281/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=JuliaTesting) | `75.03% <91.66%> (-0.04%)` | :arrow_down: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=JuliaTesting#carryforward-flags-in-the-pull-request-comment) to find out more.

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