Further expand parsing tests around yield in generator/arrow parameters

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 718b5f4ada6b9c264add2c30f08cbf9dcec1d240..3ec32bfaa05ec42a526adbf95917af891e3338a7 100644
--- a/test/cctest/test-parsing.cc
+++ b/test/cctest/test-parsing.cc
@@ -6742,6 +6742,9 @@ TEST(DefaultParametersYieldInInitializers) {
     // Arrow function within generator has the same rules.
     {"'use strict'; (function *g() { (", ") => {} });"},
     {"(function *g() { (", ") => {} });"},
+    // And similarly for arrow functions in the parameter list.
+    {"'use strict'; (function *g(z = (", ") => {}) { });"},
+    {"(function *g(z = (", ") => {}) { });"},
     {NULL, NULL}
   };