whatsnew: filecmp.clear_cache, and reword description of cache in docs.
diff --git a/Lib/filecmp.py b/Lib/filecmp.py
index 3285288..dd5a2af 100644
--- a/Lib/filecmp.py
+++ b/Lib/filecmp.py
@@ -43,8 +43,8 @@
True if the files are the same, False otherwise.
This function uses a cache for past comparisons and the results,
- with a cache invalidation mechanism relying on stale signatures
- or by explicitly calling clear_cache().
+ with cache entries invalidated if their stat information
+ changes. The cache may be cleared by calling clear_cache().
"""