allow for some fixes in analyzer

Author: jcollins-g

test/end2end/model_test.dart

@@ -3867,8 +3867,9 @@ String topLevelFunction(int param1, bool param2, Cool coolBeans,
     test('return type', () {
       expect(
           oldgeneric.modelType.linkedName,
-          equals(
-              'Function(<span class=\"parameter\" id=\"GenericTypedef-param-input\"><span class=\"type-annotation\">T</span></span>) → T'));
+          isIn(['T Function<span class="signature">(<span class="parameter" id="param-input"><span class="type-annotation">T</span> <span class="parameter-name">input</span></span>)</span>',
+            // Remove below option after analyzer 1.6.0.
+            'Function(<span class=\"parameter\" id=\"GenericTypedef-param-input\"><span class=\"type-annotation\">T</span></span>) → T']));
       expect(
           generic.modelType.linkedName,
           equals(