Bug: Double braces add a question mark `?` between the opening braces

[Quatton]

Describe the bug

Could or could not be related to #968 and #246 but seems like when you format this document:

apiVersion: apps/v1
kind: Deployment
metadata:
  name: {{ .Values.app.name }}

you get

apiVersion: apps/v1
kind: Deployment
metadata:
  name: { ? { .Values.app.name } }

Expected Behavior

Though bracket spacing is acceptable and can be disabled according to #246, question mark should not appear.

Current Behavior

Question mark appeared for some reason.

Steps to Reproduce

1. Use the provided pre-formatted document.
2. Format document
3. The malformed yaml appears.

Environment

• Windows
• Mac
• Linux
• other (please specify)

[datho7561]

Trying it out in the YAML parser, the code you sent gets treated as:

{"apiVersion":"apps/v1","kind":"Deployment","metadata":{"name":{"{ .Values.app.name }":null}}}

We don't do any special treatment for Helm templates or any sort of Go templating, so it's doing it's best to treat the double bracket as real YAML. Hence, it turns { .Values.app.name } into a complex key with a null value.

My understanding is that the ? is used to indicate that { .Values.app.name } is a complex key. In some cases, it's not obvious something is a complex key, so ? needs to be used; I think this is an unambiguous case though.

It looks like it doesn't get the ? added after I reverted the formatter changes.