field dependent empty_data option description
bug #4083 [Reference] field dependent empty_data option description (xabbuh)

This PR was merged into the 2.3 branch.

Discussion
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[Reference] field dependent empty_data option description

| Q             | A
| ------------- | ---
| Doc fix?      | yes
| New docs?     | no
| Applies to    | all
| Fixed tickets | #4007

- [x] choice
- [x] collection
- [x] country
- [x] currency
- [x] email
- [x] entity
- [x] file
- [x] form
- [x] integer
- [x] language
- [x] locale
- [x] money
- [x] number
- [x] password
- [x] percent
- [x] radio
- [x] search
- [x] text
- [x] textarea
- [x] timezone
- [x] url

Replacement of #4033.

Commits
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6b61260 field dependent empty_data option description