Correct small whitespace inconsistency, lost while renaming variables.
2 for (let j = 0; j < 6; ++j) {
4 for each (let c in [10, 20, 30]) {
9 for (let j = 0; j < 6; ++j) {
10 assertEq(a[j*3 + 0], 3);
11 assertEq(a[j*3 + 1], 10);
12 assertEq(a[j*3 + 2], 20);