diff --git a/Doc/c-api/dict.rst b/Doc/c-api/dict.rst
index 0abbd662dad394..246ce5391e142c 100644
--- a/Doc/c-api/dict.rst
+++ b/Doc/c-api/dict.rst
@@ -245,6 +245,11 @@ Dictionary Objects
    ``len(p)`` on a dictionary.
 
 
+.. c:function:: Py_ssize_t PyDict_GET_SIZE(PyObject *p)
+
+   Similar to :c:func:`PyDict_Size`, but without error checking.
+
+
 .. c:function:: int PyDict_Next(PyObject *p, Py_ssize_t *ppos, PyObject **pkey, PyObject **pvalue)
 
    Iterate over all key-value pairs in the dictionary *p*.  The
diff --git a/Doc/c-api/float.rst b/Doc/c-api/float.rst
index 489676caa3a16a..1085c32a537071 100644
--- a/Doc/c-api/float.rst
+++ b/Doc/c-api/float.rst
@@ -78,6 +78,23 @@ Floating-Point Objects
    Return the minimum normalized positive float *DBL_MIN* as C :c:expr:`double`.
 
 
+.. c:macro:: Py_RETURN_NAN
+
+   Return :data:`math.nan` from a function.
+
+   On most platforms, this is equivalent to ``return PyFloat_FromDouble(NAN)``.
+
+
+.. c:macro:: Py_RETURN_INF(sign)
+
+   Return :data:`math.inf` or :data:`-math.inf <math.inf>` from a function,
+   depending on the sign of *sign*.
+
+   On most platforms, this is equivalent to the following::
+
+      return PyFloat_FromDouble(copysign(INFINITY, sign));
+
+
 Pack and Unpack functions
 -------------------------
 
diff --git a/Doc/library/argparse.rst b/Doc/library/argparse.rst
index 9655db4f301a31..5a8f0bde2e385d 100644
--- a/Doc/library/argparse.rst
+++ b/Doc/library/argparse.rst
@@ -2070,7 +2070,9 @@ Parser defaults
      >>> parser.parse_args(['736'])
      Namespace(bar=42, baz='badger', foo=736)
 
-   Note that parser-level defaults always override argument-level defaults::
+   Note that defaults can be set at both the parser level using :meth:`set_defaults`
+   and at the argument level using :meth:`add_argument`. If both are called for the
+   same argument, the last default set for an argument is used::
 
      >>> parser = argparse.ArgumentParser()
      >>> parser.add_argument('--foo', default='bar')
diff --git a/Doc/library/curses.rst b/Doc/library/curses.rst
index fb84cf32246879..e60197ddd89adb 100644
--- a/Doc/library/curses.rst
+++ b/Doc/library/curses.rst
@@ -1349,7 +1349,6 @@ The :mod:`curses` module defines the following data members:
 
 
 .. data:: version
-.. data:: __version__
 
    A bytes object representing the current version of the module.
 
diff --git a/PC/winreg.c b/PC/winreg.c
index c7bc74728f1ff9..3cc6123fc3ab4d 100644
--- a/PC/winreg.c
+++ b/PC/winreg.c
@@ -425,19 +425,6 @@ static PyType_Spec pyhkey_type_spec = {
 /************************************************************************
    The public PyHKEY API (well, not public yet :-)
 ************************************************************************/
-PyObject *
-PyHKEY_New(PyObject *m, HKEY hInit)
-{
-    winreg_state *st = _PyModule_GetState(m);
-    PyHKEYObject *key = PyObject_GC_New(PyHKEYObject, st->PyHKEY_Type);
-    if (key == NULL) {
-        return NULL;
-    }
-    key->hkey = hInit;
-    PyObject_GC_Track(key);
-    return (PyObject *)key;
-}
-
 BOOL
 PyHKEY_Close(winreg_state *st, PyObject *ob_handle)
 {
@@ -513,48 +500,6 @@ PyHKEY_FromHKEY(winreg_state *st, HKEY h)
 }
 
 
-/************************************************************************
-  The module methods
-************************************************************************/
-BOOL
-PyWinObject_CloseHKEY(winreg_state *st, PyObject *obHandle)
-{
-    BOOL ok;
-    if (PyHKEY_Check(st, obHandle)) {
-        ok = PyHKEY_Close(st, obHandle);
-    }
-#if SIZEOF_LONG >= SIZEOF_HKEY
-    else if (PyLong_Check(obHandle)) {
-        long rc;
-        Py_BEGIN_ALLOW_THREADS
-        rc = RegCloseKey((HKEY)PyLong_AsLong(obHandle));
-        Py_END_ALLOW_THREADS
-        ok = (rc == ERROR_SUCCESS);
-        if (!ok)
-            PyErr_SetFromWindowsErrWithFunction(rc, "RegCloseKey");
-    }
-#else
-    else if (PyLong_Check(obHandle)) {
-        long rc;
-        HKEY hkey = (HKEY)PyLong_AsVoidPtr(obHandle);
-        Py_BEGIN_ALLOW_THREADS
-        rc = RegCloseKey(hkey);
-        Py_END_ALLOW_THREADS
-        ok = (rc == ERROR_SUCCESS);
-        if (!ok)
-            PyErr_SetFromWindowsErrWithFunction(rc, "RegCloseKey");
-    }
-#endif
-    else {
-        PyErr_SetString(
-            PyExc_TypeError,
-            "A handle must be a HKEY object or an integer");
-        return FALSE;
-    }
-    return ok;
-}
-
-
 /*
    Private Helper functions for the registry interfaces