+ fix __format__/__round__ signatures

Author: skirpichev

Modules/_decimal/_decimal.c

@@ -3701,15 +3701,15 @@ _decimal.Decimal.__format__
 
     self as dec: self
     fmtarg: object
-    override: object = NULL
+    override: object(c_default="NULL") = None
 
 Formats the Decimal according to fmtarg.
 [clinic start generated code]*/
 
 static PyObject *
 _decimal_Decimal___format___impl(PyObject *dec, PyObject *fmtarg,
                                  PyObject *override)
-/*[clinic end generated code: output=4b3640b7f0c8b6a5 input=d2b593420b27b367]*/
+/*[clinic end generated code: output=4b3640b7f0c8b6a5 input=b4aa4aad37438070]*/
 {
     PyObject *result = NULL;
     PyObject *dot = NULL;
@@ -4200,14 +4200,14 @@ PyDec_AsFloat(PyObject *dec)
 _decimal.Decimal.__round__
 
     self as dec: self
-    ndigits as x: object = NULL
+    ndigits as x: object(c_default="NULL") = None
 
 Return the Integral closest to self, rounding half toward even.
 [clinic start generated code]*/
 
 static PyObject *
 _decimal_Decimal___round___impl(PyObject *dec, PyObject *x)
-/*[clinic end generated code: output=5089b98ed18bb5e3 input=e34c43bf3692c2c8]*/
+/*[clinic end generated code: output=5089b98ed18bb5e3 input=a3986615e1ad5b2a]*/
 {
     PyObject *result;
     uint32_t status = 0;