Whitespace change to test rietveld cq

tools_webrtc/whitespace.txt

 You can modify this file to create no-op changelists.
 
 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
+Whitespaces are cool, except when they're trailing. Then 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?
 
 Lemur was here :)
 Kjellander as well :-o
 
 Foo Bar Baz