[grynspan]

The current implementation of @Test for Zip2Sequence (the output of zip(_:_:)) has a bug that prevents it from accepting a single, un-desugared tuple argument:

@Test(arguments: zip(x, y))
func f(_ xy: (T, U)) { // 🛑 Cannot convert value of type 'nonisolated(nonsending) @Sendable ((T, U)) async throws -> Void' to expected argument type 'nonisolated(nonsending) @Sendable (T, U) async throws -> Void'
}

This PR adjusts the signature of the underlying helper function to ensure the above syntax works as intended.

Checklist:

• Code and documentation should follow the style of the Style Guide.
• If public symbols are renamed or modified, DocC references should be updated.

[briancroom]

Nice find!