change and use Indent constant

git-svn-id: file:///home/svn/framework3/trunk@6111 4d416f70-5f16-0410-b530-b9f4589650da

tools/module_reference.rb

@@ -15,10 +15,9 @@ Indent = '   '
 # Initialize the simplified framework instance.
 $framework = Msf::Simple::Framework.create
 
-
 tbl = Rex::Ui::Text::Table.new(
 	'Header'  => 'Module References',
-	'Indent'  => 0,
+	'Indent'  => Indent.length,
 	'Columns' => [ 'Module', 'Reference' ]
 )