How can I avoid removing line breaks when updating a YAML file?

[ldosdevel01-max]

title: this is a long
  long title
a: one

Running:

yq -i e '(.a) = "two"' ~/1.yaml

Results in:

title: this is a long long title
a: two

Expected (preserving line break):

title: this is a long
  long title
a: two