Patch to re-add final newline

lexer.patch

diff --git i/jinja2/lexer.py w/jinja2/lexer.py
index 69865d0..6a540e2 100644 jinja2/lexer.py
--- i/jinja2/lexer.py
+++ w/jinja2/lexer.py
@@ -549,7 +549,12 @@ class Lexer(object):
         """This method tokenizes the text and returns the tokens in a
         generator.  Use this method if you just want to tokenize a template.
         """
+        add_final_nl = False
+        if source[-2:] is '\r\n' or source[-1] in ['\r', '\n']:
+            add_final_nl = True
         source = '\n'.join(unicode(source).splitlines())
+        if add_final_nl:
+            source += '\n'
         pos = 0
         lineno = 1
         stack = ['root']