README example for normalization before comparison of acl-like objects

Author: d-w-moore

README.md

@@ -2138,7 +2138,21 @@ session.acls.apply_atomic_operations(
 )
 ```
 `ACLOperation` objects form a linear order with `iRODSAccess` objects, and
-indeed are subclassed from them as well, allowing equivalency testing.
+indeed are subclassed from them as well, allowing intermixed sequences to be
+sorted; however, care should be taken to normalize the objects before comparisons
+or for related uses of the 'in' operator:
+```py
+normalize = lambda acl: acl.copy(decanonicalize=True, implied_zone='tempZone')
+acls = sorted(
+    [
+        iRODSAccess('read object', '/tempZone/home/alice', 'bob', 'tempZone'),
+        ACLOperation('write', 'rods'),
+        ACLOperation('read', 'bob'),
+    ], 
+    key=normalize
+)
+print(normalize(acls[0]) == normalize(acls[1]))
+```
 
 Thus, for example:
 ```py