This would then lead to a kernel patch and they would feel incredibly happy about for as long as they remembered it (little kids love to help in any way).
Think of it as the equivalent of picking up a small piece of litter on the street, and throwing it into the nearby trash can.
Maisa in this case probably learnt that there are grown-up text things like books on the computer, and it is a big thing if things do not line up and a letter is "sad". It is important to computers and people using computers.
And then to fix it for other people so that their "s" is not sad you write a letter with a computer and explain how they can fix it.
It might be interesting to hear her own memories of this, if she still remembers the episode.