Fix test for parsing 'await'.

pkg/analyzer/test/generated/parser_test.dart

Index: pkg/analyzer/test/generated/parser_test.dart
diff --git a/pkg/analyzer/test/generated/parser_test.dart b/pkg/analyzer/test/generated/parser_test.dart
index a0e80eb0a0acf1bd632d9a661862ca40012744ed..1a2f8c95029808b6f0049a78808a2eec3e4637fc 100644
--- a/pkg/analyzer/test/generated/parser_test.dart
+++ b/pkg/analyzer/test/generated/parser_test.dart
@@ -4267,7 +4267,7 @@ abstract class ExpressionParserTestMixin implements AbstractParserTestCase {
   }
 
   void test_parseAwaitExpression() {
-    AwaitExpression expression = parseAwaitExpression('await x;');
+    AwaitExpression expression = parseAwaitExpression('await x');
     expect(expression, isNotNull);
     assertNoErrors();
     expect(expression.awaitKeyword, isNotNull);