[3.12] gh-108303: Fix and move badsyntax_pep3120.py (GH-109513) (#130540)

(cherry picked from commit 4dd47c6)

Co-authored-by: Nikita Sobolev <mail@sobolevn.me>
Co-authored-by: Alex Waygood <Alex.Waygood@Gmail.com>

Author: 3 people

Lib/test/.ruff.toml

@@ -2,12 +2,12 @@ fix = true
 extend-exclude = [
     # Excluded (run with the other AC files in its own separate ruff job in pre-commit)
     "test_clinic.py",
+    # Excluded (these aren't actually executed, they're just "data files")
+    "tokenizedata/*.py",
     # Failed to lint
-    "badsyntax_pep3120.py",
     "encoded_modules/module_iso_8859_1.py",
     "encoded_modules/module_koi8_r.py",
     # Failed to parse
-    "badsyntax_3131.py",
     "test_lib2to3/data/bom.py",
     "test_lib2to3/data/crlf.py",
     "test_lib2to3/data/different_encoding.py",

Lib/test/test_utf8source.py

@@ -1,5 +1,3 @@
-# This file is marked as binary in the CVS, to prevent MacCVS from recoding it.
-
 import unittest
 
 class PEP3120Test(unittest.TestCase):
@@ -16,7 +14,7 @@ def test_pep3120(self):
 
     def test_badsyntax(self):
         try:
-            import test.badsyntax_pep3120
+            import test.tokenizedata.badsyntax_pep3120
         except SyntaxError as msg:
             msg = str(msg).lower()
             self.assertTrue('utf-8' in msg)