merge 3.3 (#19186)

diff --cc Misc/NEWS
index 4f4243c9d51f64b6371e4a6317b94dccad3f5113,045be47951c6d3fe539f1c00e469f2f27ef371ca..0bf92fd62952b2ab2768d1723078d71315dc6daa
--- 1/Misc/NEWS
--- 2/Misc/NEWS
+++ b/Misc/NEWS
@@@ -24,9 -45,8 +24,11 @@@ Core and Builtin
  Library
  -------
  
+ - Issue #19186: Restore namespacing of expat symbols inside the pyexpat module.
+ 
 +- Issue #20053: ensurepip (and hence venv) are no longer affected by the
 +  settings in the default pip configuration file.
 +
  - Issue #20426: When passing the re.DEBUG flag, re.compile() displays the
    debug output every time it is called, regardless of the compilation cache.