chain colorize doesn't right

[natqe]

• VSCode Version: 1.27.2
• Windows Version: 10

source code:

  readonly options: string[] = _.map(this.objects, 'name').
    concat('Blob', 'Time', 'String', 'Boolean', 'Date', 'Datetime', 'Decimal', 'Double', 'ID', 'Integer', 'Long', 'Object')

In the ide it doesn't look good.
See via screenshot: https://i.imgur.com/Ju6cok4.png