LibJS: Rename some variables from "script body" to "script"

This is an editorial change in the ECMA-262 spec.

See: https://github.com/tc39/ecma262/commit/38a2584

Userland/Libraries/LibJS/Interpreter.cpp

@@ -77,17 +77,17 @@ ThrowCompletionOr<Value> Interpreter::run(Script& script_record)
     // 10. Push scriptContext onto the execution context stack; scriptContext is now the running execution context.
     TRY(vm.push_execution_context(script_context, global_object));
 
-    // 11. Let scriptBody be scriptRecord.[[ECMAScriptCode]].
-    auto& script_body = script_record.parse_node();
+    // 11. Let script be scriptRecord.[[ECMAScriptCode]].
+    auto& script = script_record.parse_node();
 
-    // 12. Let result be GlobalDeclarationInstantiation(scriptBody, globalEnv).
-    auto instantiation_result = script_body.global_declaration_instantiation(*this, global_object, global_environment);
+    // 12. Let result be GlobalDeclarationInstantiation(script, globalEnv).
+    auto instantiation_result = script.global_declaration_instantiation(*this, global_object, global_environment);
     Completion result = instantiation_result.is_throw_completion() ? instantiation_result.throw_completion() : normal_completion({});
 
     // 13. If result.[[Type]] is normal, then
     if (result.type() == Completion::Type::Normal) {
-        // a. Set result to the result of evaluating scriptBody.
-        result = script_body.execute(*this, global_object);
+        // a. Set result to the result of evaluating script.
+        result = script.execute(*this, global_object);
     }
 
     // 14. If result.[[Type]] is normal and result.[[Value]] is empty, then

Userland/Libraries/LibJS/Script.cpp

@@ -15,16 +15,16 @@ namespace JS {
 // 16.1.5 ParseScript ( sourceText, realm, hostDefined ), https://tc39.es/ecma262/#sec-parse-script
 Result<NonnullRefPtr<Script>, Vector<Parser::Error>> Script::parse(StringView source_text, Realm& realm, StringView filename, HostDefined* host_defined, size_t line_number_offset)
 {
-    // 1. Let body be ParseText(sourceText, Script).
+    // 1. Let script be ParseText(sourceText, Script).
     auto parser = Parser(Lexer(source_text, filename, line_number_offset));
-    auto body = parser.parse_program();
+    auto script = parser.parse_program();
 
-    // 2. If body is a List of errors, return body.
+    // 2. If script is a List of errors, return body.
     if (parser.has_errors())
         return parser.errors();
 
-    // 3. Return Script Record { [[Realm]]: realm, [[ECMAScriptCode]]: body, [[HostDefined]]: hostDefined }.
-    return adopt_ref(*new Script(realm, filename, move(body), host_defined));
+    // 3. Return Script Record { [[Realm]]: realm, [[ECMAScriptCode]]: script, [[HostDefined]]: hostDefined }.
+    return adopt_ref(*new Script(realm, filename, move(script), host_defined));
 }
 
 Script::Script(Realm& realm, StringView filename, NonnullRefPtr<Program> parse_node, HostDefined* host_defined)