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5c7f7883c8
# Description This adds an extension trait to `Result` that wraps errors in `Spanned`, saving the effort of calling `.map_err(|err| err.into_spanned(span))` every time. This will hopefully make it even more likely that someone will want to use a spanned `io::Error` and make it easier to remove the impl for `From<io::Error> for ShellError` because that doesn't have span information.
nu-protocol
The nu-protocol crate holds the definitions of structs/traits that are used throughout Nushell. This gives us one way to expose them to many other crates, as well as make these definitions available to each other, without causing mutually recursive dependencies.