Update Doc/c-api/gen.rst

Co-authored-by: Victor Stinner <vstinner@python.org>

Author: ZeroIntensity

Doc/c-api/gen.rst

@@ -45,7 +45,7 @@ than explicitly calling :c:func:`PyGen_New` or :c:func:`PyGen_NewWithQualName`.
    A reference to *frame* is stolen by this function.  The *frame* argument
    must not be ``NULL``.
 
-.. c:function:: PyCodeObject *PyGen_GetCode(PyGenObject *gen)
+.. c:function:: PyCodeObject* PyGen_GetCode(PyGenObject *gen)
 
    Return a new :term:`strong reference` to the code object wrapped by *gen*.
    This function always succeeds.