class Spec::Matchers::Have

def failure_message
  return "expected #{relativities[@relativity]}#{@expected} errors on :#{@args[0]}, got #{@given}" if @collection_name == :errors_on
  return "expected #{relativities[@relativity]}#{@expected} error on :#{@args[0]}, got #{@given}" if @collection_name == :error_on
  return __original_failure_message
end