Fix nit.

rhettinger · rhettinger · commit 29eb40c36596 · 2004-12-01T04:22:38.000Z
diff --git a/Doc/tut/tut.tex b/Doc/tut/tut.tex
@@ -4413,7 +4413,7 @@ \section{Generators\label{generators}}
 
 Another key feature is that the local variables and execution state
 are automatically saved between calls.  This made the function easier to write
-and much more clear than an approach using class variables like
+and much more clear than an approach using instance variables like
 \code{self.index} and \code{self.data}.
 
 In addition to automatic method creation and saving program state, when
