Back out 97036ab72558 which inappropriately compared turds to third parties.
1 var loc = Reflect.parse("f()").body[0].expression.loc;
2 assertEq(loc.start.column, 0);
3 assertEq(loc.end.column, 3);
5 loc = Reflect.parse("f(x)").body[0].expression.loc;
6 assertEq(loc.start.column, 0);
7 assertEq(loc.end.column, 4);