Huh.  In an effort to be less thorough <wink>, seems I checked in a new
test that wouldn't even compile,
diff --git a/Lib/test/test_structseq.py b/Lib/test/test_structseq.py
index 33d3313..bbd7b7e 100644
--- a/Lib/test/test_structseq.py
+++ b/Lib/test/test_structseq.py
@@ -13,4 +13,4 @@
     for j in range(-len(t), len(t)):
         vereq(t[i:j], astuple[i:j])
 
-XXX more needed
+# XXX more needed