added copyright year range

git-svn-id: https://svn.apache.org/repos/asf/click/trunk/click@1049964 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/documentation/xdocs/src/docbook/click/click-book.xml b/documentation/xdocs/src/docbook/click/click-book.xml
index c9993d2..31ec380 100644
--- a/documentation/xdocs/src/docbook/click/click-book.xml
+++ b/documentation/xdocs/src/docbook/click/click-book.xml
@@ -31,7 +31,7 @@
 	
 	<bookinfo>
 		<copyright>
-			<year>2009</year>
+			<year>2001-2010</year>
 			
 			<holder>The Apache Software Foundation</holder>
 		</copyright>