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Auto-generate markdown command docs (#4451)

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* Finish updating

* a couple improvements

* Update renames

* cleanup examples
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# nth
---
title: nth
layout: command
version: 0.59.0
---
This command returns the select row of a table, starting from 0.
If the number given is less than 0 or more than the number of rows, nothing is returned.
Deprecated command
## Usage
## Signature
```shell
> [input-command] | select <row number> ...args
```
```> nth ```
## Parameters
* `<row number>` the number of the row to return
* `args`: Optionally return more rows
## Examples
```shell
> ls
────┬────────────────────┬──────┬──────────┬──────────────
# │ name │ type │ size │ modified
────┼────────────────────┼──────┼──────────┼──────────────
0 │ CODE_OF_CONDUCT.md │ File │ 3.4 KB │ 53 mins ago
1 │ CONTRIBUTING.md │ File │ 1.3 KB │ 6 mins ago
2 │ Cargo.lock │ File │ 113.3 KB │ 53 mins ago
3 │ Cargo.toml │ File │ 4.6 KB │ 53 mins ago
4 │ LICENSE │ File │ 1.1 KB │ 3 months ago
5 │ Makefile.toml │ File │ 449 B │ 5 months ago
6 │ README.md │ File │ 15.8 KB │ 2 mins ago
7 │ TODO.md │ File │ 0 B │ 53 mins ago
8 │ assets │ Dir │ 128 B │ 5 months ago
9 │ build.rs │ File │ 78 B │ 4 months ago
10 │ crates │ Dir │ 704 B │ 53 mins ago
11 │ debian │ Dir │ 352 B │ 5 months ago
12 │ docker │ Dir │ 288 B │ 3 months ago
13 │ docs │ Dir │ 192 B │ 53 mins ago
14 │ features.toml │ File │ 632 B │ 4 months ago
15 │ images │ Dir │ 160 B │ 5 months ago
16 │ rustfmt.toml │ File │ 16 B │ 5 months ago
17 │ src │ Dir │ 128 B │ 1 day ago
18 │ target │ Dir │ 160 B │ 5 days ago
19 │ tests │ Dir │ 192 B │ 3 months ago
────┴────────────────────┴──────┴──────────┴──────────────
```
```shell
> ls | select 0
──────────┬────────────────────
name │ CODE_OF_CONDUCT.md
type │ File
size │ 3.4 KB
modified │ 54 mins ago
──────────┴────────────────────
```
```shell
> ls | select 0 2
───┬────────────────────┬──────┬──────────┬─────────────
# │ name │ type │ size │ modified
───┼────────────────────┼──────┼──────────┼─────────────
0 │ CODE_OF_CONDUCT.md │ File │ 3.4 KB │ 54 mins ago
1 │ Cargo.lock │ File │ 113.3 KB │ 54 mins ago
───┴────────────────────┴──────┴──────────┴─────────────
```
```shell
> ls | select 5
──────────┬───────────────
name │ Makefile.toml
type │ File
size │ 449 B
modified │ 5 months ago
──────────┴───────────────
```