src/vs/platform/log/common/fileLog.ts/FileLogger/format
class FileLogger:	private format(args: any): string {
		let result = '';

		for (let i = 0; i < args.length; i++) {
			let a = args[i];

			if (typeof a === 'object') {
				try {
					a = JSON.stringify(a);
				} catch (e) { }
			}

			result += (i > 0 ? ' ' : '') + a;
		}

		return result;
	}