Fix a little bug due to <pre> tag in <dyn:code>

generators/index.py

@@ -237,12 +237,19 @@ class Index(DynastieGenerator):
         formatter.encoding = 'utf-8'
         
         writer = StrictUTF8Writer()
-        node.firstChild.firstChild.writexml(writer)
+        node.writexml(writer)
         code = writer.getvalue().encode('utf-8')
 
+        start = code.find('<pre>');
+        end = code.rfind('</pre>');
+
+        if start == -1 or end == -1 or end < start:
+            self.addError('Error parsing <dyn:code>')
+            return ''
+
         r,w = os.pipe()
         r,w=os.fdopen(r,'r',0), os.fdopen(w,'w',0)
-        highlight(code, lexer, formatter, w)
+        highlight(code[start+5:end], lexer, formatter, w)
         w.close()
         
         code = r.read()