)

# Description
an example should show what happens quite clearly 😋 

> **Note**
> the ugly spanned errors you'll see below are fixed in
#9039 😌

in all cases we get
```
> std help commands does-not-exist-anywhere
Help pages from external command does-not-exist-anywhere:
No manual entry for does-not-exist-anywhere
Error:
  × std::help::command_not_found
     ╭─[help:662:1]
 662 │
 663 │     let command = ($command | str join " ")
     ·     ─┬─
     ·      ╰── command not found
 664 │
     ╰────
```
but

## ❌ before this PR
```
> std help does-not-exist-anywhere
Help pages from external command does-not-exist-anywhere:
No manual entry for does-not-exist-anywhere
```
without any error, which makes it inconsistent with all the other `std
help` commands which give errors when not finding an item 🤔

## ✔️ with this PR
```
> std help does-not-exist-anywhere
Help pages from external command does-not-exist-anywhere:
No manual entry for does-not-exist-anywhere
Error:
  × std::help::item_not_found
     ╭─[help:740:1]
 740 │
 741 │     let item = ($item | str join " ")
     ·     ─┬─
     ·      ╰── item not found
 742 │
     ╰────
```

# User-Facing Changes
more consistent errors when using `std help` and `std help commands`, as
shown above.

# 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 -A clippy::result_large_err` to check that
you're using the standard code style
- `cargo test --workspace` to check that all tests pass
- `cargo run -- crates/nu-std/tests/run.nu` to run the tests for the
standard library

> **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
```
$nothing
```

related to 
- #9101
- #9039

# Description
i actually forgot to fix in #9039 the new "*item*" introduced by
#9101... 👀
there it is 😇 

# User-facing changes
going from
```
> std help git-commiteuwqi
Help pages from external command git-commiteuwqi:
No manual entry for git-commiteuwqi
Error:
  × std::help::item_not_found
     ╭─[help:721:1]
 721 │
 722 │     let item = ($item | str join " ")
     ·     ─┬─
     ·      ╰── item not found
 723 │
     ╰────
```
to
```
> std help git-commiteuwqi
Help pages from external command git-commiteuwqi:
No manual entry for git-commiteuwqi
Error:
  × std::help::item_not_found
   ╭─[entry #2:1:1]
 1 │ std help git-commiteuwqi
   ·          ───────┬───────
   ·                 ╰── item not found
   ╰────
```

# Tests + Formatting
- 🟢 `toolkit fmt`
- 🟢 `toolkit clippy`
- ⚫ `toolkit test`
- ⚫ `toolkit test stdlib`

# After Submitting
```
$nothing
```