Issue #12949: Document the kwonlyargcount argument for the PyCode_New C API function.

diff --cc Misc/NEWS
index 22244a8e76c01db2e7d1425d37e592da5894a3b4,53c258b4ad22911c12f4c9ce495af623f4333f02..5ee81172ae74fbac12ca2e09748ed9e83bff399a
--- 1/Misc/NEWS
--- 2/Misc/NEWS
+++ b/Misc/NEWS
@@@ -2100,14 -1342,6 +2100,17 @@@ C-AP
  Documentation
  -------------
  
++- Issue #12949: Document the kwonlyargcount argument for the PyCode_New
++  C API function.
++
 +- Issue #13513: Fix io.IOBase documentation to correctly link to the
 +  io.IOBase.readline method instead of the readline module.
 +
 +- Issue #13237: Reorganise subprocess documentation to emphasise convenience
 +  functions and the most commonly needed arguments to Popen.
 +
 +- Issue #13141: Demonstrate recommended style for socketserver examples.
 +
  - Issue #11818: Fix tempfile examples for Python 3.