Fix warnings and old names (#8457)

# Description

This fixes up some clippy warnings and removes some old names/info from
our unit tests

# User-Facing Changes

Internal changes only

# Tests + Formatting

Don't forget to add tests that cover your changes.

Make sure you've run and fixed any issues with these commands:

- `cargo fmt --all -- --check` to check standard code formatting (`cargo
fmt --all` applies these changes)
- `cargo clippy --workspace -- -D warnings -D clippy::unwrap_used -A
clippy::needless_collect` to check that you're using the standard code
style
- `cargo test --workspace` to check that all tests pass

> **Note**
> from `nushell` you can also use the `toolkit` as follows
> ```bash
> use toolkit.nu # or use an `env_change` hook to activate it
automatically
> toolkit check pr
> ```

# After Submitting

If your PR had any user-facing changes, update [the
documentation](https://github.com/nushell/nushell.github.io) after the
PR is merged, if necessary. This will help us keep the docs up to date.

crates/nu-command/tests/commands/get.rs

@@ -45,7 +45,7 @@ fn fetches_by_index() {
                 [package]
                 name = "nu"
                 version = "0.4.1"
-                authors = ["Yehuda Katz <wycats@gmail.com>", "Jonathan Turner <jonathan.d.turner@gmail.com>", "Andrés N. Robalino <andres@androbtech.com>"]
+                authors = ["Yehuda Katz <wycats@gmail.com>", "JT Turner <547158+jntrnr@users.noreply.github.com>", "Andrés N. Robalino <andres@androbtech.com>"]
                 description = "When arepas shells are tasty and fun."
             "#,
         )]);
@@ -92,7 +92,7 @@ fn column_paths_are_either_double_quoted_or_regular_unquoted_words_separated_by_
             "sample.toml",
             r#"
                 [package]
-                9999 = ["Yehuda Katz <wycats@gmail.com>", "Jonathan Turner <jonathan.d.turner@gmail.com>", "Andrés N. Robalino <andres@androbtech.com>"]
+                9999 = ["Yehuda Katz <wycats@gmail.com>", "JT Turner <jtd.turner@gmail.com>", "Andrés N. Robalino <andres@androbtech.com>"]
                 description = "When arepas shells are tasty and fun."
             "#,
         )]);