Add API for static strings, primarily good for identifiers.
Thanks to Konrad Schöbel and Jasper Schulz for helping with the mass-editing.
diff --git a/Misc/NEWS b/Misc/NEWS
index 26a98f4..b4dbd6e 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -10,6 +10,8 @@
 Core and Builtins
 -----------------
 
+- Add internal API for static strings (_Py_identifier et.al.).
+
 - Issue #13063: the Windows error ERROR_NO_DATA (numbered 232 and described
   as "The pipe is being closed") is now mapped to POSIX errno EPIPE
   (previously EINVAL).