Update test for parsing inline attachments
Update test for parsing inline attachments

There is a bug where an additional space is being added after the name
of an inline attachment, e.g.

```
Download and fill in the [InlineAttachment:1].
```

renders as

```
Download and fill in the registration form (ODS, 16.9KB) .
```

This test will allow us to find the problem.

alphagov/whitehall,alphagov/whitehall,alphagov/whitehall,alphagov/whitehall