Index: openacs-4/packages/acs-core-docs/www/tutorial-categories.html
===================================================================
RCS file: /usr/local/cvsroot/openacs-4/packages/acs-core-docs/www/tutorial-categories.html,v
diff -u -r1.17.2.3 -r1.17.2.4
--- openacs-4/packages/acs-core-docs/www/tutorial-categories.html	8 Apr 2021 15:44:06 -0000	1.17.2.3
+++ openacs-4/packages/acs-core-docs/www/tutorial-categories.html	3 Sep 2021 09:15:31 -0000	1.17.2.4
@@ -192,7 +192,7 @@
 		if { $use_categories_p == 1 && $category_id ne "" } {
 
 			set from_clause "category_object_map com"
-			set_where_clause "com.object_id = qa.entry_id and category_id = :category_id"
+			set_where_clause "com.object_id = qa.entry_id and com.category_id = :category_id"
 			
 			...
 								
@@ -248,7 +248,7 @@
            		</group>
          	</multiple>
 		<a href="@package_url@view?@YOURPARAMS@">All Items</if>
- 	  </pre><p>Finally you need a an <code class="computeroutput">index.vuh</code> in your 
+ 	  </pre><p>Finally you need an <code class="computeroutput">index.vuh</code> in your 
  	  www folder to rewrite the URLs correctly, <a class="xref" href="tutorial-vuh.html" title="Using .vuh files for pretty URLs">the section called “Using .vuh files for pretty URLs”</a>:</p><pre class="programlisting">
  	  set url /[ad_conn extra_url]