Fix RFC URL reference.

scheme/lib/rfc822.scm

@@ -9,8 +9,11 @@
 ;;; RFC 822 is the "Standard for the format of ARPA Internet text messages"
 ;;; -- the document that essentially tells how the fields in email headers
 ;;; (e.g., the Subject: and To: fields) are formatted. This code is for 
-;;; parsing these headers. Here are two pointers to the document:
-;;;	URL 		http://www.ietf.org/rfc/rfc0822.txt
+;;; parsing these headers.
+
+;;; Here is a pointer to the document:
+;;;    http://www.ietf.org/rfc/rfc0822.txt
+
 ;;; RFC 822 parsing is useful in other contexts as well -- the HTTP protocol
 ;;; uses it, and it tends to pop up here and there.
 ;;;