cite about-plugin
about-plugin 'Toggle sudo at the beginning of the current or the previous command by hitting the ESC key twice'

function sudo-command-line() 
{
	############ STACK_TRACE_BUILDER #####################
	Function_Name="${FUNCNAME[0]}"
	Function_PATH="${Function_PATH}/${Function_Name}"
	######################################################
  about "toggle sudo at the beginning of the current or the previous command by hitting the ESC key twice"
  group "sudo"

  [[ ${#READLINE_LINE} -eq 0 ]] && READLINE_LINE=$(fc -l -n -1 | xargs)
  if [[ $READLINE_LINE == sudo\ * ]] 
     then
    READLINE_LINE="${READLINE_LINE#sudo }"
  else
    READLINE_LINE="sudo $READLINE_LINE"
  fi
  READLINE_POINT=${#READLINE_LINE}
  ############### Stack_TRACE_BUILDER ################
	Function_PATH="$( dirname ${Function_PATH} )"
	####################################################
}

# Define shortcut keys: [Esc] [Esc]

# Readline library requires bash version 4 or later
if [ "${BASH_VERSINFO}" -ge 4 ] 
     then
  bind -x '"\e\e": sudo-command-line'
fi