Context

Mainly typos fixes in SCORU code, and some straightforward simplifications.

Better reviewable commit by commit.

More remarks and questions here (I already got answers for some of them after reading more code): https://gitlab.com/nomadic-labs/tezos/-/merge_requests/509

TODO: Squash before merging

Manually testing the MR

Document the interface of any function added or modified (see the coding guidelines)
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Provide automatic testing (see the testing guide).
For new features and bug fixes, add an item in the appropriate changelog (docs/protocols/alpha.rst for the protocol and the environment, CHANGES.rst at the root of the repository for everything else).
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Edited May 23, 2022 by Mohamed IGUERNLALA