Rule block-sequence-hyphen-indicator-newline

[Sweetchuck]

My expected style is the following:

• indent every key
• every key should be in a new line

Good

a: 'foo'
b: 42
c:
  d: 'bar'
e:
  - 'ab'
  - 'cd'
f:
  - 'scalar'
  -
    key1: 'scalar'

---

Bad

f:
  - 'scalar'
  - key1: 'scalar'

I don't like this one, because in the key path f:1:key1 the 1:key1 part is in the same line.
It can be even more confusing when it contains a null value.

f:
  - 'scalar'
  - key1:
  - 'scalar'

I couldn't achieve this with the currently available settings: yml/block-sequence-hyphen-indicator-newline

[ota-meshi]

Thank you for posting the issue.
I think maybe adding a new option like nestedHyphen would be good. However, I think we also need to consider how to behave when using the ? indicator and when using {}.
Also, please consider submitting a pull request to add the option.