--- ./doc/src/sgml/func.sgml.orig	2021-05-07 21:52:53.577952054 +0200
+++ ./doc/src/sgml/func.sgml	2021-05-07 21:53:33.078578522 +0200
@@ -17132,7 +17132,7 @@
      backslashes you want to use in the regular expression must be doubled.
      For example, to match strings that contain only digits:
 <programlisting>
-$ ? (@ like_regex "^\\d+$")
+$.* ? (@ like_regex "^\\d+$")
 </programlisting>
     </para>
    </sect3>