mitsuhiko/jinja2 — pull request #76 by kracekumar (2011-11-25 03:00:09+00:00)
Title: Changed three to four in nodes.py at line no 107

Since four major types were listed
- :class:`Stmt`: statements
- :class:`Expr`: expressions
- :class:`Helper`: helper nodes
- :class:`Template`: the outermost wrapper node

but it was mentioned as three.