spec: CreateNonEnumerableDataProperty with [[DefineOwnProperty]]

package.json

@@ -14,6 +14,6 @@
   },
   "license": "MIT",
   "devDependencies": {
-    "ecmarkup": "^4.0.0"
+    "ecmarkup": "^7.0.0"
   }
 }

spec.emu

@@ -45,14 +45,15 @@ contributors: Chengzhong Wu, Hemanth HM, Ecma International
 
     <emu-clause id="sec-createnonenumerabledataproperty">
       <h1><ins>CreateNonEnumerableDataProperty ( _O_, _P_, _V_ )</ins></h1>
-      <p><ins>The abstract operation CreateNonEnumerableDataProperty takes arguments _O_ (an Object), _P_ (a property key), and _V_ (an ECMAScript language value). It performs the following steps when called:</ins></p>
+      <p><ins>The abstract operation CreateNonEnumerableDataProperty takes arguments _O_ (an Object), _P_ (a property key), and _V_ (an ECMAScript language value). It is used to create a new non-enumerable own property of an object. It performs the following steps when called:</ins></p>
       <emu-alg>
         1. <ins>Assert: Type(_O_) is Object.</ins>
-        1. <ins>Assert: IsPropertyKey(_P_) is true.</ins>
+        1. <ins>Assert: IsPropertyKey(_P_) is *true*.</ins>
         1. <ins>Let _newDesc_ be the PropertyDescriptor { [[Value]]: _V_, [[Writable]]: *true*, [[Enumerable]]: *false*, [[Configurable]]: *true* }.</ins>
-        1. <ins>Return ? DefinePropertyOrThrow(_O_, _P_, _newDesc_).</ins>
+        1. <ins>Return ? ? _O_.[[DefineOwnProperty]](_P_, _newDesc_).</ins>
       </emu-alg>
     </emu-clause>
+    <emu-note>This abstract operation creates a property whose attributes are set to the same defaults used for properties created by the ECMAScript language assignment operator except they are not enumerable. Normally, the property will not already exist. If it does exist and is not configurable or if _O_ is not extensible, [[DefineOwnProperty]] will return *false*.</emu-note>
   </emu-clause>
 </emu-clause>