class RSpec::Matchers::BuiltIn::RaiseError

def warn_for_negative_false_positives!
  expression = if expecting_specific_exception? && @expected_message
                 "`expect { }.not_to raise_error(SpecificErrorClass, message)`"
               elsif expecting_specific_exception?
                 "`expect { }.not_to raise_error(SpecificErrorClass)`"
               elsif @expected_message
                 "`expect { }.not_to raise_error(message)`"
               elsif @warn_about_nil_error
                 "`expect { }.not_to raise_error(nil)`"
               end
  return unless expression
  warn_about_negative_false_positive! expression
end