Update to Unicode 15.0.0

The DerivedBidiClass.txt format (among others) has changed, with
multiple @missing lines for a single property now being used.  This
means that the text file itself has many fewer explicit entries, and
consequently the :bidi-class test (if left alone) would be
substantially less rigorous.  Adapt the test to keep track of which
characters have been checked already; parse the @missing lines; and
use a separate test to check the un-tested characters against the
specifications in the parsed @missing lines.

Author: csrhodes

NEWS

@@ -1,9 +1,9 @@
 ;;;; -*- coding: utf-8; fill-column: 78 -*-
 
 changes relative to sbcl-2.3.4:
-  * enhancement: Unicode support has been updated to support version 14.0.0 of
-    the Unicode standard, including addition of characters and refinements to
-    grapheme-, word- and line-breaking algorithms.
+  * enhancement: Unicode support has been updated to support version 15.0.0 of
+    the Unicode standard, including addition of characters and their collation
+    keys, and refinements to grapheme-, word- and line-breaking algorithms.
 
 changes in sbcl-2.3.4 relative to sbcl-2.3.3:
   * enhancement: attempts to call non-callable objects can now provide

doc/internals-notes/updating-unicode

@@ -1,4 +1,4 @@
-Updating Unicode versions (notes on the 10.0.0-13.0.0 updates):
+Updating Unicode versions (notes on the 10.0.0-15.0.0 updates):
 
 1. Download ucd.zip for the version to update to, along with UCA's
    allkeys.txt and CollationTest.zip, and confusables.txt from

src/code/target-unicode.lisp

@@ -827,7 +827,7 @@ The result is not guaranteed to have the same length as the input."
       ((<= #x1F1E6 cp #x1F1FF) :regional-indicator)
       ((or
         ;; Consonant_Preceding_Repha
-        (= cp #x0D4E) (= cp #x11941) (= cp #x11D46)
+        (= cp #x0D4E) (= cp #x11941) (= cp #x11D46) (= cp #x11F02)
         ;; Consonant_Prefixed
         (<= #x111C2 cp #x111C3) (= cp #x1193F) (= cp #x11A3A) (<= #x11A84 cp #x11A89)
         (proplist-p char :prepended-concatenation-mark))