Fix validation custom error asterisk field

[ping-yee]

Description
Fixes #6245
Supersedes #6352

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

[ping-yee]

May I rebase to solve resolve conflicts?

[kenjis]

May I rebase to solve resolve conflicts?

Yes, please.

[kenjis]

Thanks, but it is not "rebase", because you added another commit.
How did you do?

See https://github.com/codeigniter4/CodeIgniter4/blob/develop/contributing/workflow.md#updating-your-branch

[ping-yee]

@kenjis I reset my git flow and re-rebase, is there the git flow show normally in this time?
After I finish re-rebase, I added the test for validation.

[kenjis]

Thank you. It looks good.
If all GitHub Action checks pass, I will merge this.

[kenjis]

@ping-yee Please fix coding style.
See https://github.com/codeigniter4/CodeIgniter4/blob/develop/contributing/pull_request.md#php-style

   1) CodeIgniter4/tests/system/Validation/ValidationTest.php (trailing_comma_in_multiline, unary_operator_spaces, not_operator_with_successor_space)
      ---------- begin diff ----------
--- /home/runner/work/CodeIgniter4/CodeIgniter4/tests/system/Validation/ValidationTest.php
+++ /home/runner/work/CodeIgniter4/CodeIgniter4/tests/system/Validation/ValidationTest.php
@@ -472,7 +472,7 @@
             'foo' => [
                 ['bar' => null],
                 ['bar' => null],
-            ]
+            ],
         ];
         $this->validation->setRules(
             ['foo.*.bar' => ['label' => 'foo bar', 'rules' => 'required']],
@@ -481,7 +481,7 @@
         $this->validation->run($data);
         $this->assertSame([
             'foo.0.bar' => 'Required',
-            'foo.1.bar' => 'Required'
+            'foo.1.bar' => 'Required',
         ], $this->validation->getErrors());
     }
 

      ----------- end diff -----------

[kenjis]

Please fix coding style.

[ping-yee]

@kenjis I have been fix my coding style.
Thank for your continuous helping, I’m very grateful.

[kenjis]

@ping-yee Thank you!