Inherited a codebase that implements its own word wrapping for receipt printing. Problem is it's putting an extra space at the end of each line.

I open up the implementation, expecting it to be a relatively simple fix, until I see this…

var regex = '.{1,' +width+ '}(\\s|$)' + (cut ? '|.{' +width+ '}|.+$' : '|\\S+?(\\s|$)');
return str.match(RegExp(regex, 'g')).join(linebreak);