added example to parse-userhost / unparse->string

doc/latex/url.tex

@@ -51,8 +51,23 @@ only the parsing of http URLs is implemented.
   
   \ex{userhost->string} just does the inverse job: it unparses
   \semvar{userhost-record} into a string. The elements of the record
-  are escaped before the are put together.
-  
+  are escaped before the are put together.  
+
+  Example:
+  \begin{code}
+> (define default 
+    (make-userhost 
+     "andreas"  "se ret" "www.sf.net" "80"))
+> (userhost->string default)
+"andreas:se\%20ret@www.sf.net:80"
+> (parse-userhost 
+   '("" "" "foo\%20bar@www.scsh.net" "docu" "index.html") 
+   default)
+'#{userhost}
+> (userhost->string ##)
+"foo\%20bar:se\%20ret@www.scsh.net:80"
+\end{code}
+
   For details about escaping and unescaping see section ``Handle
   URIs'' at page \pageref{sec:uri}.
 \end{defundescx}