Fix text.

tests/FillPdfMergeTestCase.test

@@ -258,7 +258,7 @@ class FillPdfMergeTestCase extends ImageFieldTestCase {
     // The testing UI doesn't clearly indicate that these tests are being run by
     // default because we delegate to backendTest(). This is a convenience
     // marker.
-    $this->assertTrue(TRUE, 'FillPDF LocalService detected. Running tests.');
+    $this->assertTrue(TRUE, 'FillPDF LocalServer detected. Running tests.');
 
     $this->backendTest();
   }