index.js
function expandCombinedShortArg (arg) {
  /* remove initial hypen */
  arg = arg.slice(1)
  return arg.split('').map(letter => '-' + letter)
}
function expandCombinedShortArg (arg) {
  /* remove initial hypen */
  arg = arg.slice(1)
  return arg.split('').map(letter => '-' + letter)
}
function expandCombinedShortArg ( arg ) { /* remove initial hypen */ arg = arg . slice ( 1 ) return arg . split ( '' ) . map ( letter => '-' + letter ) }
Expand a combined short option.
@param {string} - the string to expand, e.g. `-ab`
@returns {string[]}
@static
Expand a combined short option .