Fix errors reported by scpell

Please review MR!!
Thanx.

Hi

I reviewed MR!8 and confirmed all coding standard issues are fixed and it passed on the Gitlab CI

I also checked PHP_CodeSniffer and no phpcs issues found.

➜  simple_wysiwyg git:(1.0.x) curl https://git.drupalcode.org/project/simple_wysiwyg/-/merge_requests/8.diff | patch -p1
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100 12342    0 12342    0     0  41947      0 --:--:-- --:--:-- --:--:-- 43153
patching file .cspell-project-words.txt
patching file .gitlab-ci.yml
patching file 'css/simple-wysiwyg.css'
patching file 'js/simple-wysiwyg.js'
➜  simple_wysiwyg git:(1.0.x) ✗ cd ..
➜  contrib git:(main) ✗ phpcs --standard=Drupal,DrupalPractice --extensions=php,module,inc,install,test,profile,theme,css,info,txt,md,yml,twig simple_wysiwyg
➜  contrib git:(main) ✗

Moving this to RTBC!
Thank you.

Thanks, have simplified the CI file and merged.