Fix the issues reported by PHP_CodeSniffer

Working on the suggested changes.

Hey @sunil jolapara, @avpaderno,
As I see there are multiple other phpcs errors in the file. Should I resolve them aswell?
Also you suggested to remove the doc comments from readme.md file, but when I remove those comments, I encounter phpcs errors stating

----------------------------------------------------------------------
  3 | ERROR | Missing short description in doc comment
 16 | ERROR | Doc comment is empty
----------------------------------------------------------------------

Kindly suggest.

In a README file, documentation comments are not mandatory. Those errors/warnings are not even shown by GitLab CI.

Okay I'll work upon it.
Also @avpaderno what should I keep the default title in line 124 Liqpay.php and line 57 of LiqpayPages.php (if the string in argument is empty).
Should I keep the title as 'default title' only ?

Heyy @avpaderno,
I have fixed the comments you dropped on the MR but now I am not clear about the following warnings of phpcs

--------------------------------------------------------------------------------
FOUND 0 ERRORS AND 1 WARNING AFFECTING 1 LINE
--------------------------------------------------------------------------------
 124 | WARNING | Only string literals should be passed to t() where possible
     |         | (Drupal.Semantics.FunctionT.NotLiteralString)
--------------------------------------------------------------------------------
FILE: ...y-3475949/web/modules/custom/liqpay-3475949/src/Controller/LiqpayPages.php
--------------------------------------------------------------------------------
FOUND 0 ERRORS AND 1 WARNING AFFECTING 1 LINE
--------------------------------------------------------------------------------
 57 | WARNING | Only string literals should be passed to t() where possible
    |         | (Drupal.Semantics.FunctionT.NotLiteralString)
--------------------------------------------------------------------------------

If you could guide me , I would be highly obiliged since I am quite new to drupal community.

Heyy @avpaderno, @sunil jolapara,
I have fixed the phpcs issues that were asked to be resolved and the phpcs pipeline has passed.
Kindly check and merge :)

@avpaderno
Worked upon the suggested changes.
Kindly check

Thanks for the changes, but not all of them worked correctly. Made adjustments for correct operation.

Hello @helena zajika,
Thank you for the merge! However, I noticed that the credits for the issue were not included. It would be great if you could add them.
Thanks!

Automatically closed - issue fixed for 2 weeks with no activity.