Issue #21445: Pass exception messages correctly to assertTrue in
the FileCompareTestCase.test_matching test.

Patch by Steven Barker.
diff --git a/Misc/ACKS b/Misc/ACKS
index 2c58324..b16dd70 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -78,6 +78,7 @@
 Daniel Barclay
 Nicolas Bareil
 Chris Barker
+Steven Barker
 Anton Barkovsky
 Nick Barnes
 Quentin Barnes