Fix the issues reported by phpcs

Created an MR to fix the issue reported by phpcs.

Please review.
Thank You.

 /**
  * @file
  * Contains Drupal\watchdog_slack\Form\SettingsForm.
+ *
  * Configures administrative settings for Watchdog to slack.
  */

That comment is not used for files containing a class.

 /**
- * Class SettingsForm.
+ * Provides a form for configuring admin settings for Watchdog Slack module.
  *
  * @package Drupal\watchdog_slack\Form
  *
@@ -38,6 +39,17 @@ class SettingsForm extends ConfigFormBase {

The short description is missing an article before Watchdog Slack module.

+  /**
+   * Builds the form for configuring admin settings for Watchdog Slack module.
+   *
+   * @param array $form
+   *   An associative array containing the structure of the form.
+   * @param \Drupal\Core\Form\FormStateInterface $form_state
+   *   The current state of the form.
+   *
+   * @return array
+   *   The form array structure.
+   */
   public function buildForm(array $form, FormStateInterface $form_state) {

The documentation comment for inherited methods or methods defined in an interface simply contain {@inheritdoc}.

         // Build log message.
-        $watchdog_message = (string) $this->t($message, $message_placeholders);
-        $watchdog_message = strip_tags($watchdog_message);
+        $translated_message = ($message);
+        $watchdog_message = strip_tags(strtr($translated_message, $message_placeholders));

The existing code and the changed code are not equivalent. The changed code is not correct.

   /**
    * Increment the count of messages sent this minute.
+   *
    * If it's a new minute of the hour, reset the counter.

Since that documentation comment is edited, also the short description needs to be edited. The verb needs to use the third person singular.
messages sent this minute is also not correct.

Hi,

MR #2 applied successfully.
All the issues been resolved.

Admin@DESKTOP-252TO6V MINGW64 ~/Desktop/projects/drupal/web/modules/contrib/watchdog_slack (8.x-1.x)
$ curl https://git.drupalcode.org/project/watchdog_slack/-/merge_requests/2.diff | patch -p1
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100  3980    0  3980    0     0   9288      0 --:--:-- --:--:-- --:--:--  9320
patching file src/Form/SettingsForm.php
patching file src/Logger/SlackLog.php
patching file watchdog_slack.links.task.yml

Admin@DESKTOP-252TO6V MINGW64 ~/Desktop/projects/drupal/web/modules/contrib/watchdog_slack (8.x-1.x)
$ cd ../

Admin@DESKTOP-252TO6V MINGW64 ~/Desktop/projects/drupal/web/modules/contrib
$ phpcs --standard=Drupal,DrupalPractice --extensions=php,module,inc,install,test,profile,theme,info,txt,md,js,yml watchdog_slack/

Admin@DESKTOP-252TO6V MINGW64 ~/Desktop/projects/drupal/web/modules/contrib
$

MR patch from Merge request !2 applies successfully and resolves all the PHPCS warnings. Attaching the screenshots for the same.

RTBC +1

apaderno → changed the visibility of the branch 8.x-1.x-patch-dc54 to hidden.