#!/usr/bin/env python3
+# © Copyright 2021-2022, Scott Gasch
+
"""Two predicates that can help avoid unnecessary disk I/O by
detecting if a particular file is identical to the contents about to
be written or if a particular directory already contains a file that
is identical to the one to be written. See class docs below for
-examples."""
+examples.
+
+"""
import hashlib
import logging