remove trailing space from inc/header.default.html

Removed an annoying trailing space from `inc/header.default.html`.

Performed `make www` to complete the above change.

2001/ctk/index.html

@@ -359,7 +359,7 @@
   <a href="../../2011/zucker/index.html">
       <img src="../../png/ioccc.png"
 	   alt="IOCCC image by Matt Zucker"
-	   width=300 
+	   width=300
 	   height=110>
   </a>
   <h1>The International Obfuscated C Code Contest</h1>