Alexei Chetroi d9d5e06baf
Use collection helpers for input_datetime component (#30815)
* Refactor input_datetime.
Keep the state as datetime, but format accordingly to has_time and
has_date.

* Use config dict for input_datetime.
* Add tests.
* Lint
Co-authored-by: Paulus Schoutsen <paulus@home-assistant.io>
2020-01-16 09:16:57 -05:00
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