* way, you should not use embedding_levels if str is visual string.
*
* For best results this function should be run on a whole paragraph, not
* lines; but feel free to do otherwise if you know what you are doing.
*
* way, you should not use embedding_levels if str is visual string.
*
* For best results this function should be run on a whole paragraph, not
* lines; but feel free to do otherwise if you know what you are doing.
*