If `$headerTimestampEnabled=2`, then the first line of the body will be merged to the title

Hey!

If we set `$headerTimestampEnabled = 2`, then instead of this:

```
# IVA

Created: 2021-07-14 07:34:57 +0100

Modified: 2021-07-14 08:00:44 +0100

---

We need to use
```

It will generate:

```
# IVAWe need to use
```

Thanks!