Fix the baffler that Tim reported: sometimes the repr() of an object

looks like <X object at ...>, sometimes it says <X instance at ...>.
Make this uniformly say <X object at ...>.

Lib/test/test_descr.py

@@ -1193,7 +1193,7 @@ def specials():
     verify(not c1 == c2)
     # Note that the module name appears in str/repr, and that varies
     # depending on whether this test is run standalone or from a framework.
-    verify(str(c1).find('C instance at ') >= 0)
+    verify(str(c1).find('C object at ') >= 0)
     verify(str(c1) == repr(c1))
     verify(-1 not in c1)
     for i in range(10):
@@ -1216,7 +1216,7 @@ def specials():
     verify(not d1 == d2)
     # Note that the module name appears in str/repr, and that varies
     # depending on whether this test is run standalone or from a framework.
-    verify(str(d1).find('D instance at ') >= 0)
+    verify(str(d1).find('D object at ') >= 0)
     verify(str(d1) == repr(d1))
     verify(-1 not in d1)
     for i in range(10):

Objects/typeobject.c

@@ -1157,12 +1157,12 @@ object_repr(PyObject *self)
 	if (name == NULL)
 		return NULL;
 	if (mod != NULL && strcmp(PyString_AS_STRING(mod), "__builtin__"))
-		rtn = PyString_FromFormat("<%s.%s instance at %p>",
+		rtn = PyString_FromFormat("<%s.%s object at %p>",
 					  PyString_AS_STRING(mod),
 					  PyString_AS_STRING(name),
 					  self);
 	else
-		rtn = PyString_FromFormat("<%s instance at %p>",
+		rtn = PyString_FromFormat("<%s object at %p>",
 					  type->tp_name, self);
 	Py_XDECREF(mod);
 	Py_DECREF(name);