Editorial: Eliminate _rec_.[[Field]] is absent (tc39#2624)

Change:
    `_rec_.[[Field]] is absent`
to:
    `_rec_ does not have a [[Field]] field`
as a follow-up to PR tc39#2620.

spec.html

@@ -4289,7 +4289,7 @@ <h1>
         </dl>
         <emu-alg>
           1. If _Desc_ is *undefined*, return *false*.
-          1. If both _Desc_.[[Get]] and _Desc_.[[Set]] are absent, return *false*.
+          1. If _Desc_ does not have a [[Get]] field and _Desc_ does not have a [[Set]] field, return *false*.
           1. Return *true*.
         </emu-alg>
       </emu-clause>
@@ -4304,7 +4304,7 @@ <h1>
         </dl>
         <emu-alg>
           1. If _Desc_ is *undefined*, return *false*.
-          1. If both _Desc_.[[Value]] and _Desc_.[[Writable]] are absent, return *false*.
+          1. If _Desc_ does not have a [[Value]] field and _Desc_ does not have a [[Writable]] field, return *false*.
           1. Return *true*.
         </emu-alg>
       </emu-clause>
@@ -14012,7 +14012,7 @@ <h1>
         <dl class="header">
         </dl>
         <emu-alg>
-          1. If _Desc_.[[Value]] is absent, then
+          1. If _Desc_ does not have a [[Value]] field, then
             1. Return OrdinaryDefineOwnProperty(_A_, *"length"*, _Desc_).
           1. Let _newLenDesc_ be a copy of _Desc_.
           1. [id="step-arraysetlength-newlen"] Let _newLen_ be ? ToUint32(_Desc_.[[Value]]).
@@ -14026,7 +14026,7 @@ <h1>
           1. If _newLen_ &ge; _oldLen_, then
             1. Return OrdinaryDefineOwnProperty(_A_, *"length"*, _newLenDesc_).
           1. If _oldLenDesc_.[[Writable]] is *false*, return *false*.
-          1. If _newLenDesc_.[[Writable]] is absent or is *true*, let _newWritable_ be *true*.
+          1. If _newLenDesc_ does not have a [[Writable]] field or _newLenDesc_.[[Writable]] is *true*, let _newWritable_ be *true*.
           1. Else,
             1. NOTE: Setting the [[Writable]] attribute to *false* is deferred in case any elements cannot be deleted.
             1. Let _newWritable_ be *false*.