Drupal coding standards

PHPCS reported the following issues.

FILE: simple_affiliate/README.txt
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FOUND 0 ERRORS AND 5 WARNINGS AFFECTING 5 LINES
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  3 | WARNING | Line exceeds 80 characters; contains 102 characters
  7 | WARNING | Line exceeds 80 characters; contains 111 characters
  8 | WARNING | Line exceeds 80 characters; contains 115 characters
 11 | WARNING | Line exceeds 80 characters; contains 124 characters
 12 | WARNING | Line exceeds 80 characters; contains 125 characters
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FILE: simple_affiliate/simple_affiliate.module
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FOUND 6 ERRORS AND 2 WARNINGS AFFECTING 5 LINES
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  1 | ERROR   | [x] Missing file doc comment
  9 | WARNING | [ ] Hook implementations should not duplicate @param documentation
  9 | ERROR   | [ ] Missing parameter comment
 11 | WARNING | [ ] Hook implementations should not duplicate @return documentation
 11 | ERROR   | [ ] Description for the @return value is missing
 18 | ERROR   | [x] Short array syntax must be used to define arrays
 22 | ERROR   | [x] Line indented incorrectly; expected 6 spaces, found 4
 22 | ERROR   | [x] Object operator not indented correctly; expected 6 spaces but found 4
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PHPCBF CAN FIX THE 4 MARKED SNIFF VIOLATIONS AUTOMATICALLY
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FILE: simple_affiliate/src/Plugin/Block/AffiliateLinkBlock.php
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FOUND 3 ERRORS AND 1 WARNING AFFECTING 4 LINES
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  1 | ERROR   | [x] The PHP open tag must be followed by exactly one blank line
  4 | ERROR   | [x] There must be one blank line after the namespace declaration
  8 | WARNING | [x] Unused use statement
 21 | ERROR   | [ ] Missing short description in doc comment
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PHPCBF CAN FIX THE 3 MARKED SNIFF VIOLATIONS AUTOMATICALLY
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