[Bug Report] cz bump --changelog adds empty lines to the beginning of the CHANGELOG.md

[misterkramer]

Description

After each execution of the command cz bump --yes --changelog, one new empty line is invariably added to the CHANGELOG.md

commitizen version

1.22.1

Steps to Reproduce

Steps to reproduce the behavior:

1. Commit change
2. Run cz bump --yes --changelog

Expected Behavior

After each executing cz bump --yes --changelog there is only one empty line at the beginning of the CHANGELOG.md

Actual Behavior

An empty line are added to the beginning of the CHANGELOG.md after each execution cz bump --yes --changelog

More Information

This can also be seen here with blame - https://github.com/commitizen-tools/commitizen/blame/master/CHANGELOG.md

I assume this is because of the parameter:

commitizen/commitizen/commands/bump.py

Line 148 in 601bd29

"incremental": True,

I can also reproduce this problem by running cz changelog --incremental

[Lee-W]

Hi, thanks for the report. I've confirmed and reproduced this bug. We'll take a look. 🙂

[woile]

Thanks we'll try to fix it, though it shouldn't affect the rendering of the changelog.

I think a possible fix would be removing the second line in the template

Or doing an lstrip in the incremental changelog_out

Also we should add a test for this, after some times I think it would affect people reading the source directly.

[misterkramer]

Thank you so much for such a quick solution!
And thank you for commitizen - this is a cool tool that we use in each of our projects.
Keep it up!:+1: