address Shu's feedback

spec.html

@@ -6913,7 +6913,7 @@ <h1>
     <emu-clause id="sec-SetterThatIgnoresPrototypeProperties" type="abstract operation">
       <h1>
         SetterThatIgnoresPrototypeProperties (
-          _this_: an ECMAScript language value,
+          _thisValue_: an ECMAScript language value,
           _home_: an Object,
           _p_: a property key,
           _v_: an ECMAScript language value,
@@ -6922,16 +6922,16 @@ <h1>
       <dl class="header">
       </dl>
       <emu-alg>
-        1. If _this_ is not an Object, then
+        1. If _thisValue_ is not an Object, then
           1. Throw a *TypeError* exception.
-        1. If SameValue(_this_, _home_) is *true*, then
+        1. If SameValue(_thisValue_, _home_) is *true*, then
           1. NOTE: Throwing here emulates assignment to a non-writable data property on the _home_ object in strict mode code.
           1. Throw a *TypeError* exception.
-        1. Let _desc_ be ? _this_.[[GetOwnProperty]](_p_).
+        1. Let _desc_ be ? _thisValue_.[[GetOwnProperty]](_p_).
         1. If _desc_ is *undefined*, then
-          1. Perform ? CreateDataPropertyOrThrow(_this_, _p_, _v_).
+          1. Perform ? CreateDataPropertyOrThrow(_thisValue_, _p_, _v_).
         1. Else,
-          1. Perform ? Set(_this_, _p_, _v_, *true*).
+          1. Perform ? Set(_thisValue_, _p_, _v_, *true*).
         1. Return ~unused~.
       </emu-alg>
     </emu-clause>
@@ -46607,7 +46607,7 @@ <h1>%IteratorHelperPrototype%.return ( )</h1>
               1. NOTE: Once a generator enters the completed state it never leaves it and its associated execution context is never resumed. Any execution state associated with _O_ can be discarded at this point.
               1. Perform ? IteratorClose(_O_.[[UnderlyingIterator]], ReturnCompletion(*undefined*)).
               1. Return CreateIteratorResultObject(*undefined*, *true*).
-            1. Let _C_ be Completion Record { [[Type]]: ~return~, [[Value]]: *undefined*, [[Target]]: ~empty~ }.
+            1. Let _C_ be ReturnCompletion(*undefined*).
             1. Return ? GeneratorResumeAbrupt(_O_, _C_, *"Iterator Helper"*).
           </emu-alg>
         </emu-clause>