You'll notice
Useful1 Signal1
Eval failure text is stripped of control characters so it cannot break the report layout.
What's wrong with this entry?
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What
The failure text shown for an eval case, taken from the heaviest failing grader or the run error, now has control characters and line and paragraph separators replaced with spaces so it cannot break report layout.
Evidence
return t ? fd(${t.name}: ${t.explanation}) : null;
Strings lifted out of the shipped bundle, so the claim above can be checked against them.