Conflicting messages on the website when a solution uses `assert`

[tasxatzial]

Original thread: https://forum.exercism.org/t/confusing-message-about-a-test-failure-while-still-accepting-solution/13254

[tasxatzial]

Same thing appears to be happening when a precondition fails, for example:

https://exercism.org/tracks/clojure/exercises/nucleotide-count/solutions/RiderSargent

The tests for nucleotide-count use (thrown? Throwable ...)

[tasxatzial]

What appears to be happening:

If we throw assertions manually, for example (throw AssertionError ...), everything works fine. If something else throws an assertion, we get the conflicting message.

The commit that may have caused this:

d25765f