Default Ok-type to `()` in `anyhow::Result` typedef

[emilk]

WARNING: This issues is a matter of style and taste! :)

I have a lot of anyhow::Result<()> in my code base. I find it ugly.

If we change the definition of anyhow::Result from

pub type Result<T, E = Error> = core::result::Result<T, E>;

to

pub type Result<T = (), E = Error> = core::result::Result<T, E>;

Then we could rewrite

fn foo() -> anyhow::Result<()> {
    …
}

to

fn foo() -> anyhow::Result {
    …
}

This would NOT be a breaking change (afaict).

[dtolnay]

I would prefer not to make this change.

You can write your own Result type alias in your crate.

[emilk]

Fair enough!