[modules] Refactor parsing of anonymous declarations in default exports.

test/cctest/test-parsing.cc

Index: test/cctest/test-parsing.cc
diff --git a/test/cctest/test-parsing.cc b/test/cctest/test-parsing.cc
index ca9cb2c20cee19c0c3a20b120c4c4e68d85893b0..9f7e889968481f85d03986264ff9bf746b27a342 100644
--- a/test/cctest/test-parsing.cc
+++ b/test/cctest/test-parsing.cc
@@ -5510,8 +5510,8 @@ TEST(BasicImportExportParsing) {
       "export default function() {}",
       "export default function*() {}",
       "export default class C {}",
-      "export default class {}"
-      "export default class extends C {}"
+      "export default class {}",
+      "export default class extends C {}",
       "export default 42",
       "var x; export default x = 7",
       "export { Q } from 'somemodule.js';",