Index: openacs-4/packages/acs-core-docs/www/xml/developers-guide/tutorial-advanced.xml
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/acs-core-docs/www/xml/developers-guide/tutorial-advanced.xml,v
diff -u -N -r1.44 -r1.45
--- openacs-4/packages/acs-core-docs/www/xml/developers-guide/tutorial-advanced.xml	13 Jan 2005 13:55:16 -0000	1.44
+++ openacs-4/packages/acs-core-docs/www/xml/developers-guide/tutorial-advanced.xml	16 Feb 2005 00:18:52 -0000	1.45
@@ -711,7 +711,7 @@
  	  <programlisting>
  	  	set use_categories_p [parameter::get -parameter "EnableCategoriesP" -default 0]
 
-		if { $use_categories_p == 1 && [exists_and_not_null category_id] } {
+		if { $use_categories_p == 1 &amp;&amp; [exists_and_not_null category_id] } {
 
 			set from_clause "category_object_map com, acs_named_objects nam"
 			set_where_clause "com.object_id = qa.entry_id and
@@ -773,7 +773,7 @@
  			&lt;multiple name="categories"&gt;
            		&lt;h2&gt;@categories.tree_name@
            		&lt;group column="tree_id"&gt;
-             		&lt;a href="@package_url@cat/@categories.category_id@?@YOURPARAMS@&category_id=@categories.category_id@"&gt;@categories.category_name@
+             		&lt;a href="@package_url@cat/@categories.category_id@?@YOURPARAMS@&amp;category_id=@categories.category_id@"&gt;@categories.category_name@
            		&lt;/group&gt;
          	&lt;/multiple&gt;
 		&lt;a href="@package_url@view?@YOURPARAMS@"&gt;All Items&lt;/if&gt;