Merge VS Code 1.23.1 (#1520)

src/vs/nls.mock.ts

@@ -0,0 +1,26 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the Source EULA. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+export interface ILocalizeInfo {
+	key: string;
+	comment: string[];
+}
+
+function _format(message: string, args: any[]): string {
+	let result: string;
+	if (args.length === 0) {
+		result = message;
+	} else {
+		result = message.replace(/\{(\d+)\}/g, function (match, rest) {
+			const index = rest[0];
+			return typeof args[index] !== 'undefined' ? args[index] : match;
+		});
+	}
+	return result;
+}
+
+export function localize(data: ILocalizeInfo | string, message: string, ...args: any[]): string {
+	return _format(message, args);
+}