Add Steve Purcell for unittest.py
diff --git a/Misc/ACKS b/Misc/ACKS
index 58e3802..962da78 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -378,6 +378,7 @@
 Amrit Prem
 Paul Prescod
 Donovan Preston
+Steve Purcell
 Brian Quinlan
 Burton Radons
 Eric Raymond