bpo-46728: fix docstring of combinations_with_replacement for consistency (GH-31293)

Author: LeeDongGeon1996

Modules/clinic/itertoolsmodule.c.h

@@ -2924,14 +2924,14 @@ itertools.combinations_with_replacement.__new__
     r: Py_ssize_t
 Return successive r-length combinations of elements in the iterable allowing individual elements to have successive repeats.
 
-combinations_with_replacement('ABC', 2) --> AA AB AC BB BC CC"
+combinations_with_replacement('ABC', 2) --> ('A','A'), ('A','B'), ('A','C'), ('B','B'), ('B','C'), ('C','C')
 [clinic start generated code]*/
 
 static PyObject *
 itertools_combinations_with_replacement_impl(PyTypeObject *type,
                                              PyObject *iterable,
                                              Py_ssize_t r)
-/*[clinic end generated code: output=48b26856d4e659ca input=dc2a8c7ba785fad7]*/
+/*[clinic end generated code: output=48b26856d4e659ca input=1dc58e82a0878fdc]*/
 {
     cwrobject *co;
     Py_ssize_t n;