minor change to pub module

tripal_pub/includes/pub_form.inc

@@ -260,7 +260,7 @@ function chado_pub_validate($node, &$form) {
     $pub['Year'] = $pyear;
     $uniquename = tripal_pub_create_citation($pub);
     if (!$uniquename) {
-      form_set_error('uniquename', 'Cannot automatically generate a citation for this publication type. Please add one manually. Title: $title');
+      form_set_error('uniquename', "Cannot automatically generate a citation for this publication type. Please add one manually. Title: $title");
     }
   }