Improve multi_line debug logs

[strawgate]

Fixes #870

Why is it important?

The current multi_line skipped message is a bit confusing and may lead a customer to believe the event has been skipped.

Checklist

• My code follows the style guidelines of this project
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have made corresponding change to the default configuration files
• I have added tests that prove my fix is effective or that my feature works
• I have added an entry in CHANGELOG.md and updated share/version.py, if my change requires a new release.

[github-actions]

Minimum allowed coverage is 100%

Generated by 🐒 cobertura-action against e3fcf4a

[zmoog]

Hey @strawgate, thanks for this PR. We'll fix the linter complaints and release an update.