code: function leftpad( string, pad, space ) {
     return string.split( '\n' ).join( `\n${spaces( pad, space )}` );
  }
docs: Take a multi-line string and pad each line with the given number of spaces.
  @private
  @param {String} string the string to pad
  @param {Number} [pad] the number of spaces to use for indent
  @param {String} [space] the character to repeat
  @return {String} a string that can be used as padding