mktables: Handle Unicode 16.0 Unikemet.txt file

This is handled by ignoring it for now, and letting mktables know that
the properties it contains are empty.  This file, new in 16.0, gives
extra information about Egyption Hieroglyphics newly encoded in 16.0.
It is intended only for scholars of these ancient symbols.

mktables normally handles new properties automatically, but this file is
in a completely different format than previous ones, so mktables would
have to be adapted to understand that.  That might not be too hard,
given that mktables has infrastructue to handle other outliers that have
come along over the years from Unicode.  But, by ignoring this file, we
create empty tables which generate errors in other places in perl.
These are real bugs that ought to be fixed, and will be before 16.0 is
incoroporated into blead.  And how many Egyptologists are there in the
world, much less how many use the latest Perl?

So the perldelta will say that 16.0's support doesn't include these,
which are mostly provisional anyway.

Author: khwilliamson

charclass_invlists.inc

@@ -436055,7 +436055,7 @@ static const U8 WB_table[23][23] = {
  * 3f4f32ed2a577344a508114527e721d7a8b633d32f38945d47fe0c743650c585 lib/unicore/extracted/DLineBreak.txt
  * 710abf2d581ac9c57f244c0834f9d9969d9781e0396adccd330eaae658ac7d6b lib/unicore/extracted/DNumType.txt
  * 6bd30f385f3baf3ab5d5308c111a81de87bea5f494ba0ba69e8ab45263b8c34d lib/unicore/extracted/DNumValues.txt
- * a1534d11ec6bef256d1829e9fd74c2202ed7f1475ae3c7659d2566e92c7e0f02 lib/unicore/mktables
+ * 803999c789a4780e22aa278e3dfa95162e48a0d329aa993cda26b99116672651 lib/unicore/mktables
  * 55d90fdc3f902e5c0b16b3378f9eaa36e970a1c09723c33de7d47d0370044012 lib/unicore/version
  * 0a6b5ab33bb1026531f816efe81aea1a8ffcd34a27cbea37dd6a70a63d73c844 regen/charset_translations.pl
  * c7ff8e0d207d3538c7feb4a1a152b159e5e902d20293b303569ea8323e84633e regen/mk_PL_charclass.pl

lib/unicore/mktables

@@ -871,6 +871,15 @@ push @tables_that_may_be_empty, 'Grapheme_Cluster_Break=Prepend'
 push @tables_that_may_be_empty, 'Canonical_Combining_Class=CCC133'
                                                     if $v_version ge v6.2.0;
 
+# These properties of Egyptian hieroglyphs are not yet handled by Perl.  Their
+# intended audience is only specialist Egyptologists
+push @tables_that_may_be_empty, qw(kEH_Cat kEH_Desc kEH_HG kEH_IFAO
+                                   kEH_JSesh
+                                   kEH_NoMirror kEH_NoMirror=Yes
+                                   kEH_NoMirror=No
+                                   kEH_NoRotate kEH_NoRotate=Yes)
+                                                    if $v_version ge v16.0.0;
+
 # The lists below are hashes, so the key is the item in the list, and the
 # value is the reason why it is in the list.  This makes generation of
 # documentation easier.
@@ -19869,6 +19878,18 @@ my @input_file_objects = (
                     Skip => $Unused_Skip,
                     UCD => 0,
                    ),
+    Input_file->new('Unikemet.txt', v16.0.0,
+                    # For Egyptian Hieroglyphs; is in an alien format to the
+                    # other files Unicode furnishes.
+                    Skip => $Unused_Skip,
+                    UCD => 0,
+                   ),
+    Input_file->new('DoNotEmit.txt', v16.0.0,
+                    # Advice about characters that are unwise to create; not
+                    # any properties, though we could create some.
+                    Skip => $Unused_Skip,
+                    UCD => 0,
+                   ),
 );
 
 # End of all the preliminaries.

lib/unicore/uni_keywords.pl

@@ -78,7 +78,7 @@
  * 3f4f32ed2a577344a508114527e721d7a8b633d32f38945d47fe0c743650c585 lib/unicore/extracted/DLineBreak.txt
  * 710abf2d581ac9c57f244c0834f9d9969d9781e0396adccd330eaae658ac7d6b lib/unicore/extracted/DNumType.txt
  * 6bd30f385f3baf3ab5d5308c111a81de87bea5f494ba0ba69e8ab45263b8c34d lib/unicore/extracted/DNumValues.txt
- * a1534d11ec6bef256d1829e9fd74c2202ed7f1475ae3c7659d2566e92c7e0f02 lib/unicore/mktables
+ * 803999c789a4780e22aa278e3dfa95162e48a0d329aa993cda26b99116672651 lib/unicore/mktables
  * 55d90fdc3f902e5c0b16b3378f9eaa36e970a1c09723c33de7d47d0370044012 lib/unicore/version
  * 0a6b5ab33bb1026531f816efe81aea1a8ffcd34a27cbea37dd6a70a63d73c844 regen/charset_translations.pl
  * c7ff8e0d207d3538c7feb4a1a152b159e5e902d20293b303569ea8323e84633e regen/mk_PL_charclass.pl