Ah, I did have a typo. But you also copied it wrong. I wrote this labels: - mylabel - {{ extraLabels | indent 4 }} # toJson doesn't work he

Ah, I did have a typo. But you also copied it wrong. I wrote this labels: - mylabel - {{ extraLabels | indent 4 }} # toJson doesn't work here. Which has an extra `-` and as you pointed out would produce a nested list. But I meant this which would merge the lists. labels: - mylabel {{ extraLabels | indent 4 }} # toJson doesn't work here.