HaikuDepot: Corrected copyright on TextLayout.cpp.

* The char classification stuff and can_end_line() originate
   from the BTextView implementation. Maybe Oliver Tappe is the
   lonely author of that code, but I don't feel like tracking this
   down at the moment and it should eventually be merged anyway,
   if what I did here proves useful at all.

src/apps/haiku-depot/textview/TextLayout.cpp

@@ -1,6 +1,13 @@
 /*
- * Copyright 2013, Stephan Aßmus <[email protected]>.
- * All rights reserved. Distributed under the terms of the MIT License.
+ * Copyright 2001-2013, Haiku, Inc. All rights reserved.
+ * Distributed under the terms of the MIT License.
+ *
+ * Authors:
+ *		Stephan Aßmus, [email protected]
+ *		Stefano Ceccherini, [email protected]
+ *		Marc Flerackers, [email protected]
+ *		Hiroshi Lockheimer (BTextView is based on his STEEngine)
+ *		Oliver Tappe, [email protected]
  */
 
 #include "TextLayout.h"