Issue #25019: Fixed a crash caused by setting non-string key of expat parser.

Added additional tests for expat parser attributes.
Based on patch by John Leitch.

diff --cc Lib/test/test_pyexpat.py
Simple merge

diff --cc Misc/ACKS
Simple merge

diff --cc Misc/NEWS
index f776bf42d8ffe5160e4d9500f17504571acf428d,ec450ff2f3c271ed81eb085e7df2d795359ac841..8b4c8594d7bdf74a65586fdeb3c81464ca0638e2
--- 1/Misc/NEWS
--- 2/Misc/NEWS
+++ b/Misc/NEWS
@@@ -11,12 -10,6 +11,15 @@@ Release date: TB
  Core and Builtins
  -----------------
  
 +Library
 +-------
 +
++- Issue #25019: Fixed a crash caused by setting non-string key of expat parser.
++  Based on patch by John Leitch.
++
 +- Issue #16180: Exit pdb if file has syntax error, instead of trapping user
 +  in an infinite loop.  Patch by Xavier de Gaye.
 +
  - Issue #24891: Fix a race condition at Python startup if the file descriptor
    of stdin (0), stdout (1) or stderr (2) is closed while Python is creating
    sys.stdin, sys.stdout and sys.stderr objects. These attributes are now set

diff --cc Modules/pyexpat.c
Simple merge