[Twisted-Python] minor patch to twisted.html.web

[Clark C. Evans]

When calling escape, this function seems to assume that
the object being called is a string; although a user
program could do this, an explict conversion here is
more generous with the input arguments.

--- html.py.orig        Wed Feb 26 23:17:00 2003
+++ html.py     Wed Feb 26 23:17:39 2003
@@ -36,6 +36,7 @@

 def escape(text):
     "Escape a few HTML special chars with HTML entities."
+    text = str(text)
     for s, h in [('&', '&'), #order is important
                  ('<', '&lt;'),
                  ('>', '&gt;'),