From 81bdc93d2fec9aa95f10e04dd019a8c207faeb52 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Martin=20v=2E=20L=C3=B6wis?= <martin@v.loewis.de>
Date: Thu, 11 Apr 2002 12:24:12 +0000
Subject: [PATCH] Explain octal escapes. Fixes #542226.

---
 Doc/lib/libre.tex | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/Doc/lib/libre.tex b/Doc/lib/libre.tex
index 61dd02899a6..5ab8d84a297 100644
--- a/Doc/lib/libre.tex
+++ b/Doc/lib/libre.tex
@@ -373,11 +373,9 @@ also accepted by the regular expression parser:
 \\
 \end{verbatim}
 
-Note that octal escapes are not included.  While the parser can
-attempt to determine whether a character is being specified by it's
-ordinal value expressed in octal, doing so yields an expression which
-is relatively difficult to maintain, as the same syntax is used to
-refer to numbered groups.
+Octal escapes are included in a limited form: If the first digit is a
+0, or if there are three octal digits, it is considered an octal
+escape. Otherwise, it is a group reference.
 
 
 \subsection{Matching vs. Searching \label{matching-searching}}