--- a/preface.roff	Thu Jul 12 00:56:47 2012 +0200
+++ b/preface.roff	Thu Jul 12 01:07:44 2012 +0200
@@ -173,7 +173,7 @@
 The reader is expected to know the format of email messages and
 the structure of email transfer systems, at least on a basic level.
 It's advisable to have cross-read RFC\|821 and RFC\|822.
-Furthermore, basic understanding of MIME (RFC\|2045\(en2049)
+Furthermore, basic understanding of MIME [RFC\|2045\(enRFC\|2049]
 is good to have.
 The Wikipedia provides good introduction-level information about email.
 .[
@@ -248,7 +248,7 @@
 .Pn cat ,
 which is in section one of the Unix manual.
 Internet technologies are specified by \fIRequests for Comments\fP (RFCs).
-Throughout the document, they are referenced as ``RFC\|821''.
+Throughout the document, they are referenced similar to ``RFC\|821''.
 A list of relevant RFCs is located at the end of the document.
 Literature is cited in backets, such as
 .[ ``[