CardTemplatePreviewer, Previewer, Reviewer handle newlines differently

[mikehardy]

Reproduction Steps

1. Open a note (with newlines I suspect) in NoteEditor
2. Hit the Preview button (opens CardTemplatePreviewer)
3. Compare with result of reviewing the same card

Expected Result

Newlines handled the same

Actual Result

Newlines handled differently?

This is reported from #6063 (comment)

Needs investigation

Debug info

Refer to the support page if you are unsure where to get the "debug info".

Research

Enter an [x] character to confirm the points below:

• I have read the support page and am reporting a bug or enhancement request specific to AnkiDroid
• I have checked the manual and the FAQ and could not find a solution to my issue
• I have searched for similar existing issues here and on the user forum
• (Optional) I have confirmed the issue is not resolved in the latest alpha release (instructions)

[david-allison]

Related: #3304