GeezerVison

…xpressions

Add support for \p{property} and \P{property} in Unicode (str) regular
expressions, for the properties the engine can resolve without the
unicodedata database.  They are matched either as CATEGORY opcodes
(character predicates and combinations of them, see sre.c) or as fixed
sets of character ranges.

Supported properties:

* many General_Category values -- the groups L, N, Z, C and the values Lu,
  Lt, Lm, Nd, Nl, No, Zs, Zl, Zp, Cc, Cf, Cs, Co and Cn;
* the binary properties Alphabetic, Lowercase, Uppercase, Numeric,
  Printable, XID_Start, XID_Continue, Cased and Case_Ignorable;
* the POSIX compatibility classes alpha, alnum, blank, cntrl, digit, graph,
  lower, print, space, upper, word and xdigit;
* the code-point classes ASCII, Any, Assigned, Noncharacter_Code_Point,
  Join_Control and the immutable Pattern_Syntax and Pattern_White_Space.

Co-Authored-By: Claude Opus 4.8 <[email protected]>

… properties

They are complete fixed sets, matched as fixed ranges: Regional_Indicator
(the 26 symbols A..Z), ASCII_Hex_Digit (the ASCII hex digits, = POSIX
xdigit) and Hex_Digit (which adds the fullwidth forms).

Co-Authored-By: Claude Opus 4.8 <[email protected]>

Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>

# Conflicts:
#	Doc/whatsnew/3.16.rst
#	Lib/re/_parser.py

Use the date the new opcodes were finalized rather than a future-dated
placeholder.

Co-Authored-By: Claude Opus 4.8 <[email protected]>