Fix foreach/if statements to match Drupal coding standards

In the .module file, there are a few lines that don't match Drupal's coding standards.

Foreach: https://cgit.drupalcode.org/wysiwyg_filter/tree/wysiwyg_filter.module?id...

If: https://cgit.drupalcode.org/wysiwyg_filter/tree/wysiwyg_filter.module?id...

This is the correct way to use foreach and if in templates.

Basing this issue on the documentation here: https://www.drupal.org/docs/develop/standards/coding-standards →