Tolerate epsilons of 0
Tolerate epsilons of 0

assert_approx_equals(x, x, 0) should pass.

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