Error in pizza slices test

[rhoot]

The tests in the pizza-slices exercise has:

swift/exercises/concept/pizza-slices/Tests/PizzaSlicesTests/PizzaSlicesTests.swift

Lines 71 to 72 in 4dea7e2

	let biggest = biggestSlice(diameterA: "0", slicesA: "8", diameterB: "16 inches", slicesB: "8")
	XCTAssertEqual(biggest, "Slice A is bigger")

First of all, I would have assumed that a pizza with a diameter of 0 is no pizza. But even if we consider that such a pizza might exist: A pizza with a diameter of 0 couldn't possibly have a larger per-slice area than a slice of a pizza with a diameter of 16", regardless of how many slices you cut the second pizza into.