Typo correction preparation.

In this one memoir of a gymnast that came out over a decade ago and that I found on my bookshelves when I moved and that I got more interested in because I had read up a bit on the Larry Nassar scandal, I've found a couple of typos, like when you go to insert a small word change all last minute and stuff, but you forget to take out the old word that you were replacing. But, since I didn't have a pencil with me when I found them, and since it's my own personal copy of the book, I folded down the top of the page in a special way, so that I can go back and mark the corrections in the book there, maybe marking out the variant words in parentheses or something, to show that they're alternate readings.