Made the number of modules a litter loser, so there's room for extra …

…modules

lang/en/docs/developer.html

@@ -100,8 +100,7 @@ <h2><a name="contribute" id="contribute"></a>2. How you can contribute</h2>
   <h3><a name="activities" id="activities"></a>Learning Activities</h3>
   <blockquote>
     <p>These are by far the most important modules, and reside in the 'mod' directory. 
-      There are seven default modules: assignment, choice, forum, quiz, 
-      resource, and survey. Each module is in a separate subdirectory and consists 
+      There are a number of default modules: assignment, choice, forum, quiz, survey, wiki, etc. Each module is in a separate subdirectory and consists 
       of the following mandatory elements (plus extra scripts unique to each module):</p>
     <ul>
       <li>mod.html: a form to set up or update an instance of this module</li>