typo in automake.texi

[Alexey Mahotkin]

Tiny one:

--- automake.texi.new   Mon Aug 27 23:56:53 2001
+++ automake.texi       Mon Aug 27 23:57:13 2001
@@ -2289,7 +2289,7 @@
 This is all handled for you if you use the @code{AM_PROG_LEX} macro
 (@pxref{Macros}).
 
-When @code{yacc} is invoked, it is passed @samp{LFLAGS} and
+When @code{lex} is invoked, it is passed @samp{LFLAGS} and
 @samp{AM_LFLAGS}.  The former is a user variable and the latter is
 intended for the @file{Makefile.am} author.
 
--alexm