form-dup-name shouldnt give error for [] assignments
No error for form-dup-name in this case:
<input type="text" name="hello[]" value="hello">
<input type="text" name="hello[]" value="world">
No error for form-dup-name in this case:
<input type="text" name="hello[]" value="hello">
<input type="text" name="hello[]" value="world">