Luc Fueston
c83334e5f2
* update support for uts39 from unicode 15 * follow uts39's recco that it's not necessary to require idents to be single-script (they call out proglang idents, reference the new uts55-5). We use a heuristic derived from the concept of identifier chunks from uts55-5, to allow idents like foo_bar_baz where each chunk around the _ can be single-or-highly-restrictive * provide directional confusability detection, by reversing spans of direction-changed chars in idents for bidi_skeleton, see issue #12929