Turn the space in [\^ ...] into a hard space: [\^\ ...].
diff --git a/Doc/lib/libre.tex b/Doc/lib/libre.tex
index 93cd4c6..3c288d1 100644
--- a/Doc/lib/libre.tex
+++ b/Doc/lib/libre.tex
@@ -232,7 +232,7 @@
equivalent to the set \code{[ \e t\e n\e r\e f\e v]}.
%
\item[\code{\e S}]Matches any non-whitespace character; this is
-equivalent to the set \code{[\^ \e t\e n\e r\e f\e v]}.
+equivalent to the set \code{[\^\ \e t\e n\e r\e f\e v]}.
%
\item[\code{\e w}]When the \code{LOCALE} flag is not specified,
matches any alphanumeric character; this is equivalent to the set