Markup nit.
diff --git a/Doc/lib/libposixpath.tex b/Doc/lib/libposixpath.tex
index 29dc4e1..87c8010 100644
--- a/Doc/lib/libposixpath.tex
+++ b/Doc/lib/libposixpath.tex
@@ -35,11 +35,10 @@
Return the argument with an initial component of \samp{\~} or
\samp{\~\var{user}} replaced by that \var{user}'s home directory. An
initial \samp{\~{}} is replaced by the environment variable
-\code{\${}HOME}; % $ <-- bow to font-lock
-an initial \samp{\~\var{user}} is looked up in the password directory through
-the built-in module \module{pwd}\refbimodindex{pwd}. If the expansion
-fails, or if the path does not begin with a tilde, the path is
-returned unchanged.
+\envvar{HOME}; an initial \samp{\~\var{user}} is looked up in the
+password directory through the built-in module
+\module{pwd}\refbimodindex{pwd}. If the expansion fails, or if the
+path does not begin with a tilde, the path is returned unchanged.
\end{funcdesc}
\begin{funcdesc}{expandvars}{p}