[wp-trac] [WordPress Trac] #36170: Small refactor in the validate_file method + unit tests

[WordPress Trac]

#36170: Small refactor in the validate_file method + unit tests
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 Reporter:  borgesbruno               |       Owner:
     Type:  enhancement               |      Status:  new
 Priority:  normal                    |   Milestone:  Awaiting Review
Component:  General                   |     Version:
 Severity:  normal                    |  Resolution:
 Keywords:  has-patch has-unit-tests  |     Focuses:
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Comment (by borgesbruno):

 I've removed the type hint, because is also necessary to do the refactor
 for {{{validate_file_to_edit}} method.

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Ticket URL: <https://core.trac.wordpress.org/ticket/36170#comment:2>
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