Fix prepending newlines on glint output

[chrisroberts]

Description

When using the glint terminal implementation, newlines are prepended to the document when accepting input (and when resizing the terminal). This will require some investigation as I think the source of the issue is coming from the glint library itself, not the terminal implementation.

Supporting material

• hashicorp/vagrant-plugin-sdk#188

Estimated task complexity time-frame (does not guarantee a delivery date

• [ ] 1 day
• [x] 1 week
• [ ] 2-3 weeks

Estimated user impact

Minor: trivial inconveniences that have robust workarounds

[soapy1]

This may be fixed in part by https://github.com/hashicorp/vagrant-plugin-sdk/pull/188. Or at least the issue of newlines being prepended when accepting input.