--- a/progs/catastrophic.rb	Tue Sep 20 12:24:29 2016 +0100
+++ b/progs/catastrophic.rb	Tue Sep 20 12:25:09 2016 +0100
@@ -1,4 +1,4 @@
-# provided by Daniel Baldwin
+# example provided by Daniel Baldwin
 
 nums = (1..1000)