adding "rust-src" to devShell

[TornaxO7]

rust-analyzer doesn't work for me, because I also need rust-src but flakes override wipes the entries in the toolchain.

[AMythicDev]

I think the best option then would be to just drop the rust-toolchain.toml and configure the devShell in flake.nix only.

[TornaxO7]

I think the best option then would be to just drop the rust-toolchain.toml and configure the devShell in flake.nix only.

so you would say that you don't want the rust-toolchain.toml at all? I mean, it's also helpful for non-nix-users.

[AMythicDev]

I think that's enough clear in the README about the MSRV plus there's no such problem with the nightly release (I can say that because I run the latest nightly) and all the intermediate releases. Hence I don't know how useful is that file for non-nix user. I mean I atleast have to run cargo with +nightly flag always. Rest I can only respect other people's DXs on this stuff.

[TornaxO7]

Okeydokey!

[TornaxO7]

done!

[AMythicDev]

Merged.