Fixed more stx bugs in DTML ref.

lib/python/Products/OFSP/help/dtml-let.stx

@@ -4,6 +4,8 @@ let: Defines DTML variables
 
   Syntax
 
+    'let' tag syntax::
+
       <dtml-let [Name=Variable][Name="Expression"]...>
       </dtml-let>
 

lib/python/Products/OFSP/help/dtml-sqlgroup.stx

@@ -30,7 +30,7 @@ sqlgroup: Formats complex SQL expressions
 
   Examples
 
-    Sample usage
+    Sample usage::
 
       select * from employees 
       <dtml-sqlgroup where>

lib/python/Products/OFSP/help/dtml-with.stx

@@ -5,6 +5,8 @@ with: Controls DTML variable look up
 
   Syntax
 
+    'with' tag syntax::
+
       <dtml-with Variable|expr="Expression">
       </dtml-with>