`nitpick` removes YAML document start

[jamesbraza]

Expected behavior

I run yamllint --strict (docs), which checks for the presence of a YAML document start.

I am finding nitpick making extra diff churn because pre-commit configs don't use document start.

Current behavior

When running nitpick, it removes the document start.

Steps to reproduce

1. Have a .pre-commit-config.yaml that previously has a document start ---
2. Run nitpick fix to generate an updated .pre-commit-config.yaml
3. Observe it removed document start ---

Possible Solution

Adding a CLI flag for preserving document starts in YAML somehow.

Context

N/a

Your environment

• nitpick version used: 0.34.0
• Python version: 3.12.0

[andreoliwa]

Hi, thanks for the multiple bug reports. :)

Adding a CLI flag for preserving document starts in YAML somehow.

I would say Nitpick should preserve existing content whenever possible, without any CLI flags.

I didn't check ruamel.yaml's docs yet; it's the YAML-preserving package I use.
I don't remember configuring it to remove document starts, I'm not sure if it is configurable at all.
I'll check it when working on this bug. 👍🏻