add option append_in_comment for show_in_comment

[shewer]

Pull request

Issue tracker

Fixes will automatically close the related issue

Fixes #

Feature

Describe feature of pull request

Unit test

• [ ] Done

Manual test

• [ ] Done

Code Review

1. Unit and manual test pass
2. GitHub Action CI pass
3. At least one contributor reviews and votes
4. Can be merged clean without conflicts
5. PR will be merged by rebase upstream base

Additional Info