code: func Greaterf(t TestingT, e1 interface{}, e2 interface{}, msg string, args ...interface{}) bool {
  	if h, ok := t.(tHelper); ok {
  		h.Helper()
  	}
  	return Greater(t, e1, e2, append([]interface{}{msg}, args...)...)
  }
docs: // Greaterf asserts that the first element is greater than the second
  //
  //    assert.Greaterf(t, 2, 1, "error message %s", "formatted")
  //    assert.Greaterf(t, float64(2, "error message %s", "formatted"), float64(1))
  //    assert.Greaterf(t, "b", "a", "error message %s", "formatted")