for compatibility with cms, add ".html" to end of HTML pages in

course.xml if missing

common/lib/xmodule/html_module.py

@@ -37,6 +37,11 @@ class Module(XModule):
             textlist=[i for i in textlist if type(i)==str]
             return "".join(textlist)
         try:
+            if not self.filename.endswith('.html'):
+                self.filename += '.html'
+        except:
+            log.exception('failed to add .html to HTML filename %s' % self.filename)
+        try: 
             filename="html/"+self.filename
             return self.filestore.open(filename).read()
         except: # For backwards compatibility. TODO: Remove