Bad rendering with jinja template and yaml

[Herbs851]

Describe the bug

Here rendering with gitea 1.12.5

Here rendering with chroma playground

As you can see there is a problem between the data_template and the service.
Due to the "key" >-
I don't know if this is normal or if it's really a bug.

[alecthomas]

YAML is horrendously complex and there are definitely some things missing from the YAML formatter.

[Herbs851]

I confirm the yaml it's really not simple ;)
My skills are a bit limited, I hope someone more competent can help.
Anyway thank you for your answer.

[jmooring]

I think this was resolved with #724. I am now unable to reproduce the problem.

LGTM