Fix incorrect backslashing in regexp example, per Robert Treat.

diff --git a/doc/src/sgml/ref/create_domain.sgml b/doc/src/sgml/ref/create_domain.sgml
index b07f571c793797b4b0f210a49aa1e68822412143..89b51aa76db7dbfc7810684fc6af4be2ead55799 100644 (file)
--- a/doc/src/sgml/ref/create_domain.sgml
+++ b/doc/src/sgml/ref/create_domain.sgml
@@ -1,5 +1,5 @@
 
 
@@ -167,8 +167,8 @@ where constraint is:
 
 CREATE DOMAIN us_postal_code AS TEXT
 CHECK(
-   VALUE ~ '^\d{5}$'
-OR VALUE ~ '^\d{5}-\d{4}$'
+   VALUE ~ '^\\d{5}$'
+OR VALUE ~ '^\\d{5}-\\d{4}$'
 );
 
 CREATE TABLE us_snail_addy (