zeroshade opened a new pull request, #1505:
URL: https://github.com/apache/arrow-go/pull/1505
### Rationale for this change
The CSV writer formats a list holding one empty string as `{}`, because
`encoding/csv` writes a record with a single empty field as an empty line. The
reader then parses `{}` as an empty list, so `[""]` round-trips to `[]`.
### What changes are included in this PR?
The list writer emits `{""}` for a list whose only element is an empty
string. Empty lists still write `{}`. Existing readers already parse `{""}` as
a one-element list.
### Are these changes tested?
Yes.
### Are there any user-facing changes?
CSV output changes for lists containing exactly one empty string: `{""}`
instead of `{}`.
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