class Pry::Command::Cat::ExceptionFormatter

def header
  unindent(
    "#{bold 'Exception:'} #{ex.class}: #{ex.message}\n" \
    "--\n" \
    "#{bold('From:')} #{backtrace_file}:#{backtrace_line} @ " \
    "#{bold("level: #{backtrace_level}")} of backtrace " \
    "(of #{ex.backtrace.size - 1}).\n\n"
  )
end