Apply suggestions from code review

Co-authored-by: Victor Stinner <[email protected]>

Author: sergey-miryanov

Modules/_testcapi/tuple.c

@@ -144,8 +144,7 @@ tuple_make_single(PyObject *Py_UNUSED(module), PyObject *args)
 static PyObject *
 tuple_make_pair(PyObject *Py_UNUSED(module), PyObject *args)
 {
-    PyObject *one;
-    PyObject *two;
+    PyObject *one, *two;
     if (!PyArg_ParseTuple(args, "OO", &one, &two)) {
         return NULL;
     }

Objects/tupleobject.c

@@ -195,7 +195,7 @@ PyTuple_MakeSingle(PyObject *one)
     }
     op->ob_item[0] = Py_NewRef(one);
     _PyObject_GC_TRACK(op);
-    return (PyObject *) op;
+    return (PyObject *)op;
 }
 
 PyObject *
@@ -211,7 +211,7 @@ PyTuple_MakePair(PyObject *one, PyObject *two)
     op->ob_item[0] = Py_NewRef(one);
     op->ob_item[1] = Py_NewRef(two);
     _PyObject_GC_TRACK(op);
-    return (PyObject *) op;
+    return (PyObject *)op;
 }
 
 /* Methods */