diff --git a/tools/whitespace.txt b/tools/whitespace.txt
index 183e4e5f61..d8a81c9c13 100644
--- a/tools/whitespace.txt
+++ b/tools/whitespace.txt
@@ -5,4 +5,4 @@ Try to write something funny. And please don't add trailing whitespace.
 A Smi balks into a war and says:
 "I'm so deoptimized today!"
 The doubles heard this and started to unbox.
-The Smi looked at them when a crazy v8-autoroll account showed up......
+The Smi looked at them when a crazy v8-autoroll account showed up.......