docs: Update style recommendations

Author: neznaika0

contributing/pull_request.md

@@ -98,6 +98,10 @@ class/interface/trait, method, and variable.
 
 Do not add PHPDoc comments that are superficial, duplicated, or stating the obvious.
 
+It is not recommended to reuse comments if the parent class or interface already contains a description of the child element.
+
+You can re-add a comment in a child element if it has a more precise type - i.e change `int|string` to `string`.
+
 See the following for more information.
 
 - [PHPDoc reference](https://docs.phpdoc.org/3.0/guide/references/phpdoc/index.html#phpdoc-reference)

contributing/styleguide.md

@@ -241,6 +241,7 @@ of the classes they declare.
 - */
   public function analyse(string $data): void {};
 ```
+- SHOULD NOT duplicate comments from the parent class or interface.
 
 ### PHPUnit Assertions