From fdae4a93e9df6b9b0f0ef5b0ccff697e4859710f Mon Sep 17 00:00:00 2001
From: Tom Lane <tgl@sss.pgh.pa.us>
Date: Tue, 3 Nov 2015 11:57:56 -0500
Subject: [PATCH] Remove obsolete advice about doubling backslashes in regex
 escapes.

Standard-conforming literals have been the default for long enough that
it no longer seems necessary to go out of our way to tell people to write
regex escapes illegibly.
---
 doc/src/sgml/func.sgml | 10 ----------
 1 file changed, 10 deletions(-)

diff --git a/doc/src/sgml/func.sgml b/doc/src/sgml/func.sgml
index 290ba52e7ec..ecca7922ace 100644
--- a/doc/src/sgml/func.sgml
+++ b/doc/src/sgml/func.sgml
@@ -4642,16 +4642,6 @@ SELECT foo FROM regexp_split_to_table('the quick brown fox', E'\\s*') AS foo;
     Non-capturing parentheses do not define subexpressions.
    </para>
 
-   <note>
-    <para>
-     Keep in mind that an escape's leading <literal>\</> will need to be
-     doubled when entering the pattern as an SQL string constant.  For example:
-<programlisting>
-'123' ~ E'^\\d{3}' <lineannotation>true</lineannotation>
-</programlisting>
-    </para>
-   </note>
-
    <table id="posix-character-entry-escapes-table">
     <title>Regular Expression Character-entry Escapes</title>