Bug: blank lines at end of Markdown blocks are not collapsed

[simonratner]

Describe the bug
When markdown block ends with one or more blank lines, those lines remain in collapsed view.

To Reproduce

1. Create a markdown block ending in blank lines:

Markdown collapsed example
--------------------------

First line
Second line

2. Collapse it:

Expected behavior
Trailing blank lines are not visible when collapsed.

Desktop (please complete the following information):

• OS: Win11
• Version 1.7.0