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added examples and explanation to trim (#1876)

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* added examples and explanation to trim

inserted examples (taken from parse in cookbook) for lists and tables using trim

* Move `to-json` to `to json`

Co-authored-by: Jonathan Turner <jonathandturner@users.noreply.github.com>
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docs/commands/trim.md
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@ -10,3 +10,45 @@ Trim leading and following whitespace from text data
> echo " Hello world" | trim
Hello world
```
Trim can also be passed a list or table of text, for which it will trim each item individually.
It will fail if any element in the list or table is not of type String.
```shell
> open greetings.json | to json
[" hi ", " hello ", " wassup "]
> open greetings.json | trim | to json
["hi", "hello", "wassup"]
```
```shell
> cargo search shells --limit 10 | lines | parse "{crate_name} = {version} #{description}"
━━━┯━━━━━━━━━━━━━━━━━━━━┯━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┯━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
# │ crate_name │ version │ description
───┼────────────────────┼─────────────────────────────┼──────────────────────────────────────────────────────────────────────────────────
0 │ shells │ "0.2.0" │ Sugar-coating for invoking shell commands directly from Rust.
1 │ ion-shell │ "0.0.0" │ The Ion Shell
2 │ shell-words │ "0.1.0" │ Process command line according to parsing rules of UNIX shell
3 │ nu │ "0.5.0" │ A shell for the GitHub era
4 │ dotenv-shell │ "1.0.1" │ Launch a new shell (or another program) with your loaded dotenv
5 │ shell_completion │ "0.0.1" │ Write shell completion scripts in pure Rust
6 │ shell-hist │ "0.2.0" │ A CLI tool for inspecting shell history
7 │ tokei │ "10.0.1" │ A utility that allows you to count code, quickly.
8 │ rash-shell │ "0.1.0" │ A bourne-compatible shell inspired by dash
9 │ rust_keylock_shell │ "0.10.0" │ Shell access to the rust-keylock. rust-keylock is a password manager with goals
│ │ │ to be Secure, …
━━━┷━━━━━━━━━━━━━━━━━━━━┷━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┷━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
> cargo search shells --limit 10 | lines | parse "{crate_name} = {version} #{description}" | trim
━━━┯━━━━━━━━━━━━━━━━━━━━┯━━━━━━━━━━┯━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
# │ crate_name │ version │ description
───┼────────────────────┼──────────┼──────────────────────────────────────────────────────────────────────────────────
0 │ shells │ "0.2.0" │ Sugar-coating for invoking shell commands directly from Rust.
1 │ ion-shell │ "0.0.0" │ The Ion Shell
2 │ shell-words │ "0.1.0" │ Process command line according to parsing rules of UNIX shell
3 │ nu │ "0.5.0" │ A shell for the GitHub era
4 │ dotenv-shell │ "1.0.1" │ Launch a new shell (or another program) with your loaded dotenv
5 │ shell_completion │ "0.0.1" │ Write shell completion scripts in pure Rust
6 │ shell-hist │ "0.2.0" │ A CLI tool for inspecting shell history
7 │ tokei │ "10.0.1" │ A utility that allows you to count code, quickly.
8 │ rash-shell │ "0.1.0" │ A bourne-compatible shell inspired by dash
9 │ rust_keylock_shell │ "0.10.0" │ Shell access to the rust-keylock. rust-keylock is a password manager with goals
│ │ │ to be Secure, …
━━━┷━━━━━━━━━━━━━━━━━━━━┷━━━━━━━━━━┷━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━