The odd thing is, I was pretty sure that was the "last chapter" that she wrote out ahead of time. The last word isn't "scar," but it does appear in the last sentence. And interviews have confirmed this. Apparently it did get shorter, though:
Those of you who wanted more details (and wanted to know why they weren't in the epilogue) might want to read these. You might also want to read some comments posted by Cheryl Klein, the Scholastic editor who copyedited the books in the U.S.:
I particularly liked one of the comments by a blog visitor:
...she can show a portion of the truth and make you believe it, and then show you more later, and suddenly you realize you've got to restructure the entire story all over again in your head. She does that so well that she can use that technique over and over, yet it continues to surprise.