Changes since tag v18

commit 7e0bea40932121395ee3d67becb7e8ccfef9676f
Author: (rowaasr13) Oleg V. Volkov <rowaasr13@gmail.com>
Date:   Wed Mar 10 06:42:07 2021 +0300

    new pattern and extended list of "insignificant spacing" characters inspired by it; regenerate entire list - sync to generator commit c76cd495da5b776b5bb2dac9e654ecc4593a5796

