Issue #21088: Merge from 3.4.

diff --cc Misc/NEWS
index 9eaab87bd99797826c1cc735e3a0702ee31202c4,2b79789beef601d31760e91f035ca3b708359f33..653d8ad3a41992a6f7c2998d7ac7ac6a794256d4
--- 1/Misc/NEWS
--- 2/Misc/NEWS
+++ b/Misc/NEWS
@@@ -69,19 -39,9 +69,22 @@@ Core and Builtin
  Library
  -------
  
+ - Issue #21088: Bugfix for curses.window.addch() regression in 3.4.0.
+   In porting to Argument Clinic, the first two arguments were reversed.
+ 
 +- Issue #10650: Remove the non-standard 'watchexp' parameter from the
 +  Decimal.quantize() method in the Python version.  It had never been
 +  present in the C version.
 +
 +- Issue #19414: Have the OrderedDict mark deleted links as unusable.
 +  This gives an early failure if the link is deleted during iteration.
 +
 +- Issue #21421: Add __slots__ to the MappingViews ABC.
 +  Patch by Josh Rosenberg.
 +
 +- Issue #21101: Eliminate double hashing in the C speed-up code for
 +  collections.Counter().
 +
  - Issue #21321: itertools.islice() now releases the reference to the source
    iterator when the slice is exhausted.  Patch by Anton Afanasyev.