fix for Bugzilla Bug 37607

 	Spacewar demo has wrong focus on 14 JVM
(I'm allowed to do the easy ones too every now and then ;) ).

docs/dist/doc/examples/spacewar/README.html

@@ -55,6 +55,9 @@ to control; the red ships are an enemy robots.  Your ship is controlled
 with the four arrow keys to turn, thrust and stop; the spacebar
 fires.  As you play, the game will be displayed in both windows.</p>
 
+<p>When running on a 1.4 or later VM, click in the main panel to give
+	it focus so that your keystrokes are recognized.</p>
+
 <p>You can quit the game with ctl-Q.</p>
 
 <h3><a name="5.3">Exploring the Code</a></h3>