Make step() return the argument's return value
Make step() return the argument's return value

RatneshThakur/testharness.js,jyasskin/testharness.js,hallvors/testharness.js,jyasskin/testharness.js,hallvors/testharness.js,bboyle/testharness.js,ayg/testharness.js,zqzhang/testharness.js