Header and Body should end with newline \n

[getreu]

Description

MarkText strips whitespaces at the end of an .md file. This is especially a problem when the file consists of a header only. In this case MarkText even strips the newline after the closing ----!

• Can you reproduce the issue?

Steps to reproduce

$ cat Note.md 
---
title:      "getreu"
---


$
$ cp Note.md Note-old.md 
$
$ marktext Note.md
getreu@saar1:~$ cat Note.md 
---
title:      "getreu"
---$
$ diff Note-old.md Note.md
3,5c3
< ---
< 
< 
---
> ---
\ No newline at end of file
$

Expected behavior:

Note.md and Note-old.md are equal.

Actual behavior:

See diff output above.

Versions

• Mark Text version: v0.16.2
• Operating system: Debian 10.5