CQ whitespace.

NOTRY=True
NOPRESUBMIT=True
NOTREECHECKS=True
TBR=kjellander@webrtc.org
BUG=

Review-Url: https://codereview.webrtc.org/2585683003
Cr-Commit-Position: refs/heads/master@{#15644}

tools-webrtc/whitespace.txt

@@ -4,4 +4,4 @@ Try to write something funny. And please don't add trailing whitespace.
 Whitespaces are cool, except when they're trailing. They they're kind of
 80s.
 Here's a funny story: What do you call a root beer in a square glass? Beer!
-Holidays are coming, beware! Bought any gifts yet?
+Holidays are coming, beware! Bought any gifts yet? No.