I mean it does its job and it is good. I would use it. But look at this case; test string inout [123:0] Asdfg

Exp (made it wrong in purpose) ^inout\s+\[[0-9]\: It just display "No Matches".

It would be cool if it kind of guide what exp you want to use to match test string. What you put in Test string is what you want to get.