Layering: Return the realm EC from InitializeHostDefinedRealm

Author: jmdyck

spec.html

@@ -11647,7 +11647,7 @@ <h1>Realms</h1>
       <h1>
         InitializeHostDefinedRealm (
           _customizations_: an Abstract Closure that takes a Realm Record and returns a List of 2 elements, each of which is either an Object or *undefined*,
-        ): ~unused~
+        ): an execution context
       </h1>
       <dl class="header">
         <dt>description</dt>
@@ -11694,8 +11694,7 @@ <h1>
         1. Set the Function of _newContext_ to *null*.
         1. Set the Realm of _newContext_ to _realm_.
         1. Set the ScriptOrModule of _newContext_ to *null*.
-        1. Push _newContext_ onto the execution context stack; _newContext_ is now the running execution context.
-        1. Return ~unused~.
+        1. Return _newContext_.
       </emu-alg>
     </emu-clause>