The "Table of files" display for file field should use plural form label of more than one files attached

This is not big deal issue, but still to make Drupal UI perfect I believe it should be addressed.

To see the issue:

1. Add new file field
2. Set "Number of values" to "Unlimited"
3. Set "Table of files" format on "Manage display" tab
4. Create a new node attaching more than one file

Rendered table has "Attachment" label on singular form.

The expected behavior was to see plural form "Attachments" if the file filed has more than one file.