build/azure-pipelines/publish-types/update-types.ts/getNewFileContent
function getNewFileContent(content: string, tag: string) {
	const oldheader = [
		`/*---------------------------------------------------------------------------------------------`,
		` *  Copyright (c) Microsoft Corporation. All rights reserved.`,
		` *  Licensed under the MIT License. See License.txt in the project root for license information.`,
		` *--------------------------------------------------------------------------------------------*/`
	].join('\n');

	return convertTabsToSpaces(getNewFileHeader(tag) + content.slice(oldheader.length));
}