Issue #3338469: Drupal Coding Standards Issues | phpcs

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• 8fc1da10 - #3338469: Addressing comment #6

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Adding a comment for a group of functions (callbacks, hook implementations, API functions) is fine. What should be done is:

• Use the correct comment delimiter, since // must be used only inside functions/methods
• Avoid to add those "grouping comments" as short description for the first function/method to then make the existing short description a long description

There are warnings/errors for files the merge request does not change.