doc: mention libpq regression tests

Reported-by: Ryo Matsumura
Discussion: https://postgr.es/m/TYCPR01MB11316B3FB56EE54D70BF0CEF6E8E4A@TYCPR01MB11316.jpnprd01.prod.outlook.com

Backpatch-through: 11

diff --git a/doc/src/sgml/regress.sgml b/doc/src/sgml/regress.sgml
index 485084748c2b72595c99389c8b20c23a236069e1..1e08cb64584c8485124d3d884981ca1b60e9224c 100644 (file)
--- a/doc/src/sgml/regress.sgml
+++ b/doc/src/sgml/regress.sgml
@@ -180,8 +180,9 @@ make installcheck-world
    </listitem>
    <listitem>
     <para>
-     Regression tests for the ECPG interface library,
-     located in <filename>src/interfaces/ecpg/test</filename>.
+     Regression tests for the interface libraries,
+     located in <filename>src/interfaces/libpq/test</filename> and
+     <filename>src/interfaces/ecpg/test</filename>.
     </para>
    </listitem>
    <listitem>