class RuboCop::Formatter::EmacsStyleFormatter

The output is machine-parsable.
easy to process in the Emacs text editor.
This formatter displays the report data in format that’s

def file_finished(file, offenses) 

def file_finished(file, offenses)
  offenses.each do |o|
    output.printf(
      "%<path>s:%<line>d:%<column>d: %<severity>s: %<message>s\n",
      path: file,
      line: o.line,
      column: o.real_column,
      severity: o.severity.code,
      message: message(o)
    )
  end
end

def message(offense) 

def message(offense)
  message =
    if offense.corrected_with_todo?
      "[Todo] #{offense.message}"
    elsif offense.corrected?
      "[Corrected] #{offense.message}"
    elsif offense.correctable?
      "[Correctable] #{offense.message}"
    else
      offense.message
    end
  message.tr("\n", ' ')
end