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/format_conversions/csv.rs

@@ -82,7 +82,7 @@ fn infers_types() {
             r#"
                 first_name,last_name,rusty_luck,d
                 Andrés,Robalino,1,d
-                Jonathan,Turner,1,d
+                JT,Turner,1,d
                 Yehuda,Katz,1,d
                 Jason,Gedge,1,d
             "#,
@@ -109,7 +109,7 @@ fn from_csv_text_to_table() {
             r#"
                 first_name,last_name,rusty_luck
                 Andrés,Robalino,1
-                Jonathan,Turner,1
+                JT,Turner,1
                 Yehuda,Katz,1
             "#,
         )]);
@@ -136,7 +136,7 @@ fn from_csv_text_with_separator_to_table() {
             r#"
                 first_name;last_name;rusty_luck
                 Andrés;Robalino;1
-                Jonathan;Turner;1
+                JT;Turner;1
                 Yehuda;Katz;1
             "#,
         )]);
@@ -163,7 +163,7 @@ fn from_csv_text_with_tab_separator_to_table() {
             r#"
                 first_name	last_name	rusty_luck
                 Andrés	Robalino	1
-                Jonathan	Turner	1
+                JT	Turner	1
                 Yehuda	Katz	1
             "#,
         )]);
@@ -189,7 +189,7 @@ fn from_csv_text_skipping_headers_to_table() {
             "los_tres_amigos.txt",
             r#"
                 Andrés,Robalino,1
-                Jonathan,Turner,1
+                JT,Turner,1
                 Yehuda,Katz,1
             "#,
         )]);

crates/nu-command/tests/format_conversions/json.rs

@@ -26,7 +26,7 @@ fn from_json_text_to_table() {
                 {
                     "katz": [
                         {"name":   "Yehuda", "rusty_luck": 1},
-                        {"name": "Jonathan", "rusty_luck": 1},
+                        {"name": "JT", "rusty_luck": 1},
                         {"name":   "Andres", "rusty_luck": 1},
                         {"name":"GorbyPuff", "rusty_luck": 1}
                     ]
@@ -50,7 +50,7 @@ fn from_json_text_recognizing_objects_independently_to_table() {
             "katz.txt",
             r#"
                 {"name":   "Yehuda", "rusty_luck": 1}
-                {"name": "Jonathan", "rusty_luck": 1}
+                {"name": "JT", "rusty_luck": 1}
                 {"name":   "Andres", "rusty_luck": 1}
                 {"name":"GorbyPuff", "rusty_luck": 3}
             "#,

crates/nu-command/tests/format_conversions/tsv.rs

@@ -86,7 +86,7 @@ fn from_tsv_text_to_table() {
             r#"
                 first Name	Last Name	rusty_luck
                 Andrés	Robalino	1
-                Jonathan	Turner	1
+                JT	Turner	1
                 Yehuda	Katz	1
             "#,
         )]);
@@ -112,7 +112,7 @@ fn from_tsv_text_skipping_headers_to_table() {
             "los_tres_amigos.txt",
             r#"
                 Andrés	Robalino	1
-                Jonathan	Turner	1
+                JT	Turner	1
                 Yehuda	Katz	1
             "#,
         )]);

crates/nu-command/tests/format_conversions/xml.rs

@@ -5,7 +5,7 @@ fn table_to_xml_text_and_from_xml_text_back_into_table() {
     let actual = nu!(
         cwd: "tests/fixtures/formats", pipeline(
         r#"
-            open jonathan.xml
+            open jt.xml
             | to xml
             | from xml
             | get content