func (m *sayMatcher) FailureMessage(actual interface{}) (message string) {
	return fmt.Sprintf(
		"Got stuck at:\n%s\nWaiting for:\n%s",
		format.IndentString(string(m.receivedSayings), 1),
		format.IndentString(m.re.String(), 1),
	)
}
func (m *sayMatcher) NegatedFailureMessage(actual interface{}) (message string) {
	return fmt.Sprintf(
		"Saw:\n%s\nWhich matches the unexpected:\n%s",
		format.IndentString(string(m.receivedSayings), 1),
		format.IndentString(m.re.String(), 1),
	)
}
func (matcher *HaveOccurredMatcher) NegatedFailureMessage(actual interface{}) (message string) {
	return fmt.Sprintf("Expected error:\n%s\n%s\n%s", format.Object(actual, 1), format.IndentString(actual.(error).Error(), 1), "not to have occurred")
}
func (matcher *SucceedMatcher) FailureMessage(actual interface{}) (message string) {
	return fmt.Sprintf("Expected success, but got an error:\n%s\n%s", format.Object(actual, 1), format.IndentString(actual.(error).Error(), 1))
}