fixes

spec.emu

@@ -1164,7 +1164,7 @@ contributors: Luca Casonato, Guy Bedford, Nicolò Ribaudo
               <td>
                 <p><ins>It returns either a normal completion containing the Module Source Object corresponding to this source Module Record's source phase (<emu-xref href="#sec-module-source-objects"></emu-xref>), or a throw completion.</ins></p>
                 <p><ins>When called multiple times on the same Module Record, if GetModuleSource() returns a normal completion it must always return a normal completion containing the same object.</ins></p>
-                <p><ins>The returned object should be an instance of a subclass of %AbstractModuleSource%, and it must have an internal slot [[ModuleSourceClassName]].</ins></p>
+                <p><ins>The returned object should have a [[Prototype]] internal slot whose value is %AbstractModuleSource.prototype%.</ins></p>
                 <p><ins>For Module Records that do not have a source representation, GetModuleSource() must always return a throw completion whose [[Value]] is a *ReferenceError*.</ins></p>
               </td>
             </tr>