Correct small nits reported by Rob Hooft.
diff --git a/Doc/lib/libre.tex b/Doc/lib/libre.tex
index 6791be7..33f7cb8 100644
--- a/Doc/lib/libre.tex
+++ b/Doc/lib/libre.tex
@@ -133,7 +133,7 @@
%
\item[\code{|}]\code{A|B}, where A and B can be arbitrary REs,
creates a regular expression that will match either A or B. This can
-be used inside groups (see below) as well. To match a literal '|',
+be used inside groups (see below) as well. To match a literal '\code{|}',
use \code{\e|}, or enclose it inside a character class, like \code{[|]}.
%
\item[\code{(...)}] Matches whatever regular expression is inside the