Consistency: "unix" ==> "\UNIX{}"
Added \label{} for referring to the module.
diff --git a/Doc/lib/libmailbox.tex b/Doc/lib/libmailbox.tex
index 8db4c91..42bdfda 100644
--- a/Doc/lib/libmailbox.tex
+++ b/Doc/lib/libmailbox.tex
@@ -1,4 +1,5 @@
\section{Standard Module \sectcode{mailbox}}
+\label{module-mailbox}
\stmodindex{mailbox}
\renewcommand{\indexsubitem}{(in module mailbox)}
@@ -7,7 +8,7 @@
access to mail messages in a (unix) mailbox.
\begin{funcdesc}{UnixMailbox}{fp}
-Access a classic unix-style mailbox, where all messages are contained
+Access a classic \UNIX{}-style mailbox, where all messages are contained
in a single file and separated by ``From name time'' lines. \var{Fp}
is the file object pointing to the mailbox file.
\end{funcdesc}