fix: migrate:rollback -b negative number

[kenjis]

Description
See #7349

Fixes the incorrect documentation and help.
We cannot specify negative number as an option value on CLI.

Checklist:

• Securely signed commits
• [] Component(s) with PHPDoc blocks, only if necessary or adds value
• [] Unit testing, with >80% coverage
• User guide updated
• Conforms to style guide

[MGatner]

I wonder if this was a feature we lost, or if it never worked?

[kenjis]

It never worked. Arguments with leading - are options.

Checked 4.0.0:

--- a/system/Commands/Database/MigrateRollback.php
+++ b/system/Commands/Database/MigrateRollback.php
@@ -107,6 +107,7 @@ class MigrateRollback extends BaseCommand
     */
    public function run(array $params = [])
    {
+       dd(CLI::getOptions());
        $runner = Services::migrations();
 
        $group = $params['-g'] ?? CLI::getOption('g');

$ php spark migrate:rollback -b -10


CodeIgniter CLI Tool - Version 4.0.0 - Server-Time: 2023-03-17 19:45:57pm


┌────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┐
│ CLI::getOptions()                                                                                                  │
└────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┘
array (2) [
    'b' => null
    10 => null
]
══════════════════════════════════════════════════════════════════════════════════════════════════════════════════════
Called from .../system/Commands/Database/MigrateRollback.php:110 [dd()]