- Do you want to request a feature or report a bug?
Bug

- What is the current behavior?
Netlify CMS saves JSON data without a newline at the end of the file.

- If the current behavior is a bug, please provide the steps to reproduce.
Configure a collection type with format: "json" and extension: "json", then create and publish a new post in the Dashboard.

- What is the expected behavior?
JSON file should created with newline at the end of the file.