[gtk-doc] manual: fix GTKDOC_CHECK usage example

[Dan Williams <dcbw src gnome org>]

commit 8796e5f550d715d9f854d8bf4f123047b98ba774
Author: Dan Williams <dcbw redhat com>
Date:   Mon Sep 28 16:21:38 2009 -0700

    manual: fix GTKDOC_CHECK usage example

 help/manual/C/gtk-doc-manual.xml |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/help/manual/C/gtk-doc-manual.xml b/help/manual/C/gtk-doc-manual.xml
index bba7ae9..6151481 100644
--- a/help/manual/C/gtk-doc-manual.xml
+++ b/help/manual/C/gtk-doc-manual.xml
@@ -1302,7 +1302,7 @@ gtk_arrow_get_type
 
     <tip>
       <para>
-        Enable or add the <option>TESTS=($GTKDOC_CHECK)</option> line in Makefile.am.
+        Enable or add the <option>TESTS=$(GTKDOC_CHECK)</option> line in Makefile.am.
         If at least gtk-doc 1.9 is installed, this will run sanity checks during
         make check run.
       </para>