class Guard::RSpec::Command

def _rspec_formatters
  # RSpec::Core::ConfigurationOptions#parse_options method was renamed to
  # #options in rspec-core v3.0.0.beta2 so call the first one if
  # available. Fixes #249
  config = ::RSpec::Core::ConfigurationOptions.new([])
  config.parse_options if config.respond_to?(:parse_options)
  formatters = config.options[:formatters] || nil
  # RSpec's parser returns an array in the format
  #
  # [[formatter, output], ...],
  #
  # so match their format Construct a matching command line option,
  # including output target
  return formatters unless formatters
  formatters.map { |entries| "-f #{entries.join ' -o '}" }.join(" ")
end