fix some stx quoting problems - argh it seems that stx quoting rules have changed

lib/python/Products/ZopeTutorial/tutorial.stx

@@ -414,9 +414,9 @@ Lesson 6. Recent Elvis Sightings, cont.
   Notice how each sighting now has a box drawn around it.
   
   What's going on? The [<dtml-in>] tag iterates over a list of
-  objects. The '&lt;dtml-var sequence-item&gt;' tag inserts the
+  objects. The &lt;'dtml-var sequence-item'&gt; tag inserts the
   current object. The 'expr="sightingsFolder.objectValues()"' part of
-  the '&lt;dtml-in&gt;' tags tells it how to get a list of objects. It
+  the [<dtml-in>] tags tells it how to get a list of objects. It
   calls the 'objectValues' method of the 'sightingsFolder' folder.
   'objectValues' returns all the objects contained by a folder.
   
@@ -427,7 +427,7 @@ Lesson 6. Recent Elvis Sightings, cont.
   
     * [<dtml-in>] iterates over a list of objects.
     
-    * '&lt;dtml-var sequence-item&gt;' inserts the current object
+    * &lt;'dtml-var sequence-item'&gt; inserts the current object
     when looping over a list of objects.
     
     * You can get the contents of a folder by calling its
@@ -772,7 +772,7 @@ Lesson 11. The Elvis Files
     to edit it. 
 
   Notice that the sightings are generated by iterating over the
-  'sightings' ZSQL Method with the '&lt;dtml-in&gt;' tag.
+  'sightings' ZSQL Method with the [<dtml-in>] tag.
   
     2. Add a line between each sighting by changing the contents of
     the 'sightings' DTML Document to::