Enhance documentation for Dict.fromList

[ypyl]

There is no information at Dict.fromList that it will remove any duplicated keys and will keep only the latest value associated with this particular key.
It will be great to have such information in the documentation explicitly. Same way as it is for Set.fromList

[github-actions]

Thanks for reporting this! To set expectations:

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Finally, please be patient with the core team. They are trying their best with limited resources.