class RuboCop::RSpec::ParallelFormatter

def dump_failures(notification)

removed!
output goes where in the final parallelized output, and should not be
The BEGIN/END comments are used by `spec_runner.rake` to determine what 
def dump_failures(notification)
  return if notification.failure_notifications.empty?
  output.puts '# FAILURES BEGIN'
  notification.failure_notifications.each do |failure|
    output.puts failure.fully_formatted('*', colorizer)
  end
  output.puts
  output.puts '# FAILURES END'
end