Normal quotes

appendix-a.md

@@ -5,15 +5,15 @@
 Afterword {#Heading1}
 ---------
 
-If you’ve followed me this far, you might agree that we’ve come through
-some rough country. Still, I’m of the opinion that hard-won knowledge is
+If you've followed me this far, you might agree that we've come through
+some rough country. Still, I'm of the opinion that hard-won knowledge is
 the best knowledge, not only because it sticks to you better, but also
 because winning a hard race makes it easier to win the next one.
 
 This is an unusual book in that sense: In addition to being a
 compilation of much of what I know about fast computer graphics, it is a
 journal recording some of the process by which I discovered and refined
-that knowledge. I didn’t just sit down one day to write this book—I
+that knowledge. I didn't just sit down one day to write this book—I
 wrote it over a period of years and published its component parts in
 many places. It is a journal of my successes and frustrations, with side
 glances of my life as it happened along the way.
@@ -30,7 +30,7 @@ is much the richer for it.
 Here and there, I learned things that had nothing at all to do with fast
 graphics.
 
-For example: I’m not a doomsayer who thinks American education lags
+For example: I'm not a doomsayer who thinks American education lags
 hopelessly behind the rest of the Western world, but now and then
 something happens that makes me wonder. Some time back, I received a
 letter from one Melvyn J. Lafitte requesting that I spend some time in
@@ -44,7 +44,7 @@ His technique involved defining polygon vertices in clockwise order, as
 viewed from the visible side. Then, he explained, one can use the
 cross-product equations found in any math book to determine which way
 the perpendicular to the polygon is pointing. Better yet, he pointed
-out, it’s necessary to calculate only the Z component of the
+out, it's necessary to calculate only the Z component of the
 perpendicular, and only the sign of the Z component need actually be
 tested.
 
@@ -58,28 +58,28 @@ fundamental techniques of 3-D drawing.
 Melvyn lives in Moens, France. At the time he wrote me, Melvyn was 17
 years old. Try to imagine any American 17-year-old of your acquaintance
 inventing backface removal. Try to imagine any teenager you know even
-using the phrase “the cross-product equations found in any math book.”
+using the phrase "the cross-product equations found in any math book."
 Not to mention that Melvyn was able to write a highly technical letter
-in English; and if Melvyn’s English was something less than flawless, it
+in English; and if Melvyn's English was something less than flawless, it
 was perfectly understandable, and, in my experience, vastly better than
-an average, or even well-educated, American’s French. Please understand,
+an average, or even well-educated, American's French. Please understand,
 I believe we Americans excel in a wide variety of ways, but I worry that
 when it comes to math and foreign languages, we are becoming a nation of
 *têtes de pomme de terre*.
 
-Maybe I worry too much. If the glass is half empty, well, it’s also half
+Maybe I worry too much. If the glass is half empty, well, it's also half
 full. Plainly, something I wrote inspired Melvyn to do something that is
 wonderful, whether he realizes it or not. And it has been tremendously
 gratifying to sense in the letters I have received the same feeling of
 remarkably smart people going out there and doing amazing things just
 for the sheer unadulterated fun of it.
 
-I don’t think I’m exaggerating too much (well, maybe a little) when I
-say that this sort of fun is what I live for. I’m glad to see that so
+I don't think I'm exaggerating too much (well, maybe a little) when I
+say that this sort of fun is what I live for. I'm glad to see that so
 many of you share that same passion.
 
 Good luck. Thank you for your input, your code, and all your kind words.
-Don’t be afraid to attempt the impossible. Simply knowing what is
+Don't be afraid to attempt the impossible. Simply knowing what is
 impossible is useful knowledge—and you may well find, in the wake of
 some unexpected success, that not half of the things we call impossible
 have any right at all to wear the label.