Missing return statements in named-arguments-anywhere tests

[nshahan]

It looks like there are missing return statements in the anonymous functions that appear in these test expectations:

co19/LanguageFeatures/Named-arguments-anywhere/local_t03.dart

Lines 18 to 26 in 063592e

	Expect.equals("x=1, y=2, z=3", (int x, int y, {int z = 42}) {
	"x=$x, y=$y, z=$z";}(1, 2, z: 3)
	);
	Expect.equals("x=1, y=2, z=3", (int x, int y, {int z = 42}) {
	"x=$x, y=$y, z=$z";}(z: 3, 1, 2)
	);
	Expect.equals("x=1, y=2, z=3", (int x, int y, {int z = 42}) {
	"x=$x, y=$y, z=$z";}(1, z: 3, 2)
	);

co19/LanguageFeatures/Named-arguments-anywhere/local_t04.dart

Lines 18 to 26 in 063592e

	Expect.equals("x=1, y=2, z=3", <T>(T x, T y, {T? z}) {
	"x=$x, y=$y, z=$z";}<int>(1, 2, z: 3)
	);
	Expect.equals("x=1, y=2, z=3", <T>(T x, T y, {T? z}) {
	"x=$x, y=$y, z=$z";}<int>(z: 3, 1, 2)
	);
	Expect.equals("x=1, y=2, z=3", <T>(T x, T y, {T? z}) {
	"x=$x, y=$y, z=$z";}<int>(1, z: 3, 2)
	);

The functions are called correctly but at runtime they return null instead of the expected String.