Issue #7084: Fix a (very unlikely) crash when printing a list from one
thread, and mutating it from another one.  Patch by Scott Dial.
diff --git a/Misc/ACKS b/Misc/ACKS
index 6383a46..c8f80e6 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -175,6 +175,7 @@
 Erik Demaine
 Roger Dev
 Raghuram Devarakonda
+Scott Dial
 Toby Dickenson
 Mark Dickinson
 Jack Diederich