wrong comment in files.h

[Florian Krohm]

There is no -a flag in bison AFAICT..

Index: files.h
===================================================================
RCS file: /cvsroot/bison/bison/src/files.h,v
retrieving revision 1.29
diff -u -r1.29 files.h
--- files.h     2 May 2002 15:06:46 -0000       1.29
+++ files.h     4 May 2002 21:32:25 -0000
@@ -27,10 +27,10 @@
 /* File name for the parser (i.e., the one above, or its default.) */
 extern char *parser_file_name;
 
-/* For -a. */
+/* Symbol prefix specified with -p, or 0 if no -p.  */
 extern const char *spec_name_prefix;
 
-/* File name pfx specified with -b, or 0 if no -b.  */
+/* File name prefix specified with -b, or 0 if no -b.  */
 extern char *spec_file_prefix;
 
 /* --verbose. */