Discuss Clippy configuration

[6r1d]

The original tutorial file contains this line:

#![allow(clippy::restriction, clippy::needless_borrow)]

There's another Clippy config at million_accounts_genesis:

#![allow(missing_docs, clippy::pedantic, clippy::restriction)]

I'm not sure how important Clippy configuration is for the examples, and I have to return to this after I move the tests.

Feature list

Since I'm not sure what each part does, I'll add links and discuss the other parts below.

• clippy::needless_borrow - "Checks for address of operations (&) that are going to be dereferenced immediately by the compiler." It seems like a good idea to enable this check again.
• clippy::restriction - https://doc.rust-lang.org/stable/clippy/usage.html#clippyrestriction
• clippy::pedantic - https://doc.rust-lang.org/stable/clippy/usage.html#clippypedantic
• missing_docs - I don't know how similar it is to the missing_docs_in_private_items

[6r1d]

For now, I'm trying to understand whether these lines

allow = [
    # We don't want to manually deny every `clippy::restriction::*` lint.
    'clippy::blanket-clippy-restriction-lints',
]

match this code

#![allow(clippy::restriction)]

[6r1d]

Current Clippy lints are configured here: https://github.com/hyperledger/iroha/blob/iroha2-dev/lints.toml