Fix 'bidi-class' property of unassigned codepoints

* admin/unidata/unidata-gen.el (unidata-file-alist): Update the
default values of 'bidi-class' according to the latest Unicode
Standard.

* admin/notes/unicode: Mention possible changes in
DerivedBidiClass.txt that need to be reflected in unidata-gen.el.

* lisp/international/characters.el (#xfb50, #xfdf0): Fix the
Arabic block characters.  (Bug#55256)

1 files changed, 6 insertions, 0 deletions

diff --git a/admin/notes/unicode b/admin/notes/unicode
index 41661995000..f699f4fb1c0 100644
--- a/admin/notes/unicode
+++ b/admin/notes/unicode
@@ -36,6 +36,12 @@ copyright.html in admin/unidata (some of them might need trailing
 whitespace removed before they can be committed to the Emacs
 repository).
 
+Next, review the assignment of default values of the Bidi Class
+property to blocks in the file extracted/DerivedBidiClass.txt from the
+UCD (search for "unassigned" in that file).  Any changes should be
+reflected in the unidata-gen.el file, where it sets up the default
+values around line 210.
+
 Then Emacs should be rebuilt for them to take effect.  Rebuilding
 Emacs updates several derived files elsewhere in the Emacs source
 tree, mainly in lisp/international/.