class Cucumber::Formatter::Rerun

def after_test_case(test_case, result)
  return if result.passed?
  @failures[test_case.location.file] ||= []
  @failures[test_case.location.file] << test_case.location.line
end

def done
  return if @failures.empty?
  @io.print file_failures.join(' ')
end

def file_failures
  @failures.map { |file, lines| [file, lines].join(':') }
end

def initialize(runtime, path_or_io, options)
  @io = ensure_io(path_or_io, "rerun")
  @failures = {}
end