Refresh for current main: regenerate at UCD 18, retarget to 3.16

Regenerate Objects/unicodetype_db.h at Unicode 18.0.0 with the White_Space
property (25 whitespace code points; U+001C..U+001F no longer whitespace).
Retarget the docs versionchanged and test notes from 3.9 to 3.16, rename the
NEWS entry to the current gh-issue convention, and update the unicodedata
method checksums for the intended behavior change.

Co-authored-by: Muse Code (Meta Muse Spark)

Author: ambv

Doc/builtins/stdtypes.rst

@@ -2572,7 +2572,7 @@ expression support in the :mod:`re` module).
    The whitespace characters are `as defined by Unicode
    <https://www.unicode.org/reports/tr44/#White_Space>`_.
 
-   .. versionchanged:: 3.9
+   .. versionchanged:: 3.16
       Previously used a different definition of whitespace characters,
       which included the additional characters ``\x1c``, ``\x1d``,
       ``\x1e``, and ``\x1f``.

Lib/test/test_str.py

@@ -760,13 +760,13 @@ def test_isspace(self):
 
     @support.requires_resource('cpu')
     def test_isspace_invariant(self):
-        '''
-        Before Python 3.9, `str.isspace` used a certain formula
+        """
+        Before Python 3.16, `str.isspace` used a certain formula
         combining the General Category and the Bidirectional Class.
 
-        Since Python 3.9, we use the White_Space property that Unicode
+        Since Python 3.16, we use the White_Space property that Unicode
         now provides.  Check that these differ only on U+001C..U+001F .
-        '''
+        """
         for codepoint in range(sys.maxunicode + 1):
             char = chr(codepoint)
             bidirectional = unicodedata.bidirectional(char)
@@ -849,7 +849,7 @@ def test_isnumeric(self):
             self.assertTrue(ch.isnumeric(), '{!a} is numeric.'.format(ch))
 
     def test_bytes_consistency(self):
-        '''Check str and bytes agree on character properties within ASCII.'''
+        """Check str and bytes agree on character properties within ASCII."""
         for codepoint in range(0x80):
             char = chr(codepoint)
             byte = bytes([codepoint])

Lib/test/test_unicodedata.py

@@ -55,9 +55,9 @@ def download_test_data_file(filename):
 class UnicodeMethodsTest(unittest.TestCase):
 
     # update this, if the database changes
-    expectedchecksum = ('2bb59305a65254fee9cd6ef981cc3cab7551c60e'
+    expectedchecksum = ('a95371700ebbde3c78130d5e713bfdb6958dfb12'
                         if quicktest else
-                        'bb69894a259aee5971445eca8e617a1686a432e2')
+                        '56aaa60dc1f94b8876d521937c5788aa3dd62cc3')
 
     def test_method_checksum(self):
         h = hashlib.sha1()

…2019-08-07-21-30-13.bpo-18236.YtYsEp.rst …10-22-22-30-47.gh-issue-62436.rxu3A4.rstMisc/NEWS.d/next/Core and Builtins/2019-08-07-21-30-13.bpo-18236.YtYsEp.rst renamed to Misc/NEWS.d/next/Core and Builtins/2026-10-22-22-30-47.gh-issue-62436.rxu3A4.rst Misc/NEWS.d/next/Core and Builtins/2019-08-07-21-30-13.bpo-18236.YtYsEp.rst renamed to Misc/NEWS.d/next/Core and Builtins/2026-10-22-22-30-47.gh-issue-62436.rxu3A4.rst

@@ -1,4 +1,4 @@
 The definition of "whitespace" provided by :meth:`str.isspace` and
 :c:func:`Py_UNICODE_ISSPACE` now follows Unicode's ``White_Space`` property.
 This has the effect that the four characters ``\x1c``, ``\x1d``, ``\x1e``,
-``\x1f`` are no longer treated as whitespace.  Patch by Greg Price.
+``\x1f`` are no longer treated as whitespace.