Tail Wing Dented—Is it safe to fly? I’m sitting in the lounge waiting to board this flight. Saw a dent in the attachment of tail wing to the body. Is this common?

Also I could be wrong and it is part of the design of the airplane.

Any guidance is appreciated!
The aircraft in question is an Embraer ERJ 175 the "dent" allows the tail trim to operate properly you can see it more clearly in this picture. 



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