Issue #18149: Add filecmp.clear_cache() to manually clear the filecmp cache.
Patch by Mark Levitt
diff --git a/Misc/ACKS b/Misc/ACKS
index bff2f3c..ec8d94f 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -738,6 +738,7 @@
 Christopher Tur Lesniewski-Laas
 Alain Leufroy
 Mark Levinson
+Mark Levitt
 William Lewis
 Akira Li
 Xuanji Li