Massimiliano Pippi ff3165b8b8
fix: fix un-flattening of metadata (#6318)
* fix un-flattening of metadata

* test should pass

* add relnote

* change policy: raise an error if both meta and keys are passed

* Update document.py

* support python 3.8

* adjust wording in the error message
2023-11-16 17:10:53 +01:00
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