Whitespace control and indentation

[b4nst]

resources:
  - sa.yaml
{% for project in projects %}
  - iam-bindings/{{project}}.yaml
{% endfor %}

gives

resources:
  - sa.yaml

  - iam-bindings/project-id-test.yaml

resources:
  - sa.yaml
{% for project in projects -%}
  - iam-bindings/{{project}}.yaml
{% endfor %}

gives

resources:
  - sa.yaml
- iam-bindings/project-id-test.yaml

How can one achieve:

resources:
  - sa.yaml
  - iam-bindings/project-id-test.yaml

I tried with the indent function but same result.