Update license for rdoc generation

lib/wpstools/generate_list.rb

@@ -1,6 +1,6 @@
 #!/usr/bin/env ruby
 
-#
+#--
 # WPScan - WordPress Security Scanner
 # Copyright (C) 2012
 #
@@ -16,6 +16,7 @@
 #
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#++
 
 # This tool generates a list to use for plugin and theme enumeration
 class Generate_List