Editorial: swap order of arguments to PrivateGet (tc39#2504)

Author: bakkot

spec.html

@@ -4076,7 +4076,7 @@ <h1>
           1. If IsPropertyReference(_V_) is *true*, then
             1. [id="step-getvalue-toobject"] Let _baseObj_ be ? ToObject(_V_.[[Base]]).
             1. If IsPrivateReference(_V_) is *true*, then
-              1. Return ? PrivateGet(_V_.[[ReferencedName]], _baseObj_).
+              1. Return ? PrivateGet(_baseObj_, _V_.[[ReferencedName]]).
             1. Return ? _baseObj_.[[Get]](_V_.[[ReferencedName]], GetThisValue(_V_)).
           1. Else,
             1. Let _base_ be _V_.[[Base]].
@@ -6647,8 +6647,8 @@ <h1>
     <emu-clause id="sec-privateget" type="abstract operation">
       <h1>
         PrivateGet (
-          _P_: a Private Name,
           _O_: an Object,
+          _P_: a Private Name,
         )
       </h1>
       <dl class="header">