There’s an app (or script) for that [Userscript]: Double-Check (Version 2.x)
I hate it when I fail a review because of a typo!
It’s just such a dark tool of temptation
Although very, very useful
Because I’m so easily swayed to the dark side of “oh, I clearly meant to type”
So yes, @kaishin123 - try that script, but beware my warning 
I wanted to try that at one point. But i am afraid i am going to abuse it. So i dropped the idea. Otherwise i almost have 1~3 typos every second review section