--- a/degal/html.py	Wed Jun 10 23:14:37 2009 +0300
+++ b/degal/html.py	Wed Jun 10 23:15:14 2009 +0300
@@ -5,7 +5,7 @@
 """
 
 from cgi import escape
-import itertools as _itertools
+import itertools as _itertools, types as _types
 
 class IRenderable (object) :
     """
@@ -90,6 +90,8 @@
 
             Items that are None will be omitted from the return value.
 
+            Certain core sequence types will be recognized and flattened for output: tuples, lists, and generators.
+
             >>> list(Container.process_contents([]))
             []
             >>> list(Container.process_contents([None]))
@@ -101,9 +103,14 @@
         for content in contents :
             if content is None :
                 continue
-                        
+            
+            # Hardcoded list of special-case nested contents
+            elif isinstance(content, (_types.TupleType, _types.ListType, _types.GeneratorType)) :
+                for subcontent in cls.process_contents(content) :
+                    yield subcontent
+
             else :
-                # normal, handle as unicode data
+                # normal, handle as IRenderable/unicode data
                 yield content
 
     def __init__ (self, *contents) :