merge/override results in duplicate keys

[dinurp]

Merge/Overriding results in duplicate keys

Input Yaml

templates:
  default: &default
    labels:
      sync: everyday
charts:
  - name: test
    <<: *default
    chart: test
    labels:
      sync: thur

from: roboll/helmfile#657

with yj -yy results in

Output Yaml

templates:
  default:
    labels:
      sync: everyday
charts:
  - name: test
    labels:
      sync: everyday
    chart: test
    labels:
      sync: thur

Note that the key labels/sync is duplicate; it should have overwritten the original value.