Minor glitch

preface94.tex

@@ -12,7 +12,7 @@ obsolete, or at best archaic. A ``revised, updated edition'' would
 have entrailed a rewrite of many sections, a larger effort than I'm
 able to make at the time.
 
-Off all the opinions in the book, the one that I most regret seeing in
+Of all the opinions in the book, the one that I most regret seeing in
 print is my criticism of object-oriented programming. Since penning
 this book, I've had the pleasure of writing an application in a
 version of \Forth{} with support for object-oriented programming,