Fixed latex2html weirdness for a footnote.
diff --git a/Doc/ext/ext.tex b/Doc/ext/ext.tex
index 283e284..6ca74f9 100644
--- a/Doc/ext/ext.tex
+++ b/Doc/ext/ext.tex
@@ -1294,8 +1294,8 @@
The C function calling mechanism guarantees that the argument list
passed to C functions (\code{args} in the examples) is never
-\NULL{} --- in fact it guarantees that it is always a tuple.%
-\footnote{These guarantees don't hold when you use the ``old'' style
+\NULL{} --- in fact it guarantees that it is always a tuple.\footnote{
+These guarantees don't hold when you use the ``old'' style
calling convention --- this is still found in much existing code.}
It is a severe error to ever let a \NULL{} pointer ``escape'' to