Make internal module references hyperlinks wherever it makes sense.
diff --git a/Doc/lib/libformatter.tex b/Doc/lib/libformatter.tex
index 13d0dee..fcda71d 100644
--- a/Doc/lib/libformatter.tex
+++ b/Doc/lib/libformatter.tex
@@ -8,7 +8,7 @@
This module supports two interface definitions, each with mulitple
implementations. The \emph{formatter} interface is used by the
-\class{HTMLParser} class of the \module{htmllib} module, and the
+\class{HTMLParser} class of the \refmodule{htmllib} module, and the
\emph{writer} interface is required by the formatter interface.
\withsubitem{(class in htmllib)}{\ttindex{HTMLParser}}