An empty string message follows Node 24.22's rules for each assertion:
- equal, notEqual, strictEqual, notStrictEqual, deepStrictEqual,
notDeepStrictEqual and fail pass it to the AssertionError constructor,
so the message stays empty, or the diff header is the default one, and
generatedMessage is true (`!message`).
- match, doesNotMatch, and throws with a regex, a class or an object shape
treat it as no message: the generated message is built and
generatedMessage is true.
- throws with nothing thrown and doesNotReject end their message with "."
instead of ": ", and keep generatedMessage false.
- ok and assert() keep the empty message with generatedMessage false.
assert.fail computes generatedMessage from the message value at run time.
Corpus 5521 covers each method with a literal and a computed empty
message.
Chris Tate