You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: expectations.rb
    path of file: ./repos/ruby/spec/mspec/lib/mspec/expectations
    
    the code of the file until where you have to start completion: class SpecExpectationNotMetError < StandardError
end

class SpecExpectati
    
  def self.fail_with(expected, actual)
    expected_to_s = expected.to_s
    actual_to_s = actual.to_s
    if expected_to_s.size + actual_to_s.size > 80
      message = "#{expected_to_s}\n#{actual_to_s}"
    else
      message = "#{expected_to_s} #{actual_to_s}"
    end