Renable long skipped test

Author: kevmoo

test/model_test.dart

@@ -461,17 +461,10 @@ void main() {
 
       test('links to a top-level variable with a prefix from an imported lib',
           () {
-        expect(docsAsHtml,
-            contains('<a href="">css.theOnlyThingInTheLibrary</a>'));
-      },
-          skip:
-              'Wait for https://github.com/dart-lang/dartdoc/issues/767 to be fixed');
-
-      // remove this test when the above test is fixed. just here to
-      // track when the behavior changes
-      test('codeifies a prefixed top-level variable an imported lib', () {
         expect(
-            docsAsHtml, contains('<code>css.theOnlyThingInTheLibrary</code>'));
+            docsAsHtml,
+            contains(
+                '<p>Reference to prefixed-name from another lib <code>css.theOnlyThingInTheLibrary</code> xx</p>'));
       });
 
       test('links to a name with a single underscore', () {