[BUG][scala-http-client] Default body should not be a single space
Created by: mickaelmagniez
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Description
The default body sent (for example POST request without any body) is " " (single space character).
Some backends (for example akka-http) failed to parse it as json.
So it will be better so send an empty body rather than just a space.
openapi-generator version
5.2.1