Made a comment more clear

--HG--
extra : convert_revision : svn%3Afdd8eb12-d10e-0410-9acb-85c331704f74/trunk%403715

examples/thread_function_ex.cpp

@@ -62,8 +62,9 @@ int main()
 
 
 
-    // we will wait for t3 to end here because the destructor for
-    // thread_function objects always waits for their thread to end
+    // At this point we will automatically wait for t3 to end because
+    // the destructor for thread_function objects always wait for their
+    // thread to terminate.
 }