w and merge reformats file in an unexpected way

[zhujik]

For example, running

yq w -i values.yaml rbac.create false

On this file: https://raw.githubusercontent.com/helm/charts/master/stable/grafana/values.yaml

Will cause 77 lines added and 114 lines removed for just one change.

Most noticable is that he removes empty lines and moves the indentation level of some block comments.

[mikefarah]

Yeah unfortunately the underlying go-yaml parser does not perfectly preserve the original formatting (though I think it does a reasonable job).

[mikefarah]

go-yaml/yaml#627