Index: Python/graminit.c
===================================================================
--- Python/graminit.c	(revision 62321)
+++ Python/graminit.c	(working copy)
@@ -1,3 +1,5 @@
+/* Generated by Parser/pgen */
+
 #include "pgenheaders.h"
 #include "grammar.h"
 static arc arcs_0_0[3] = {
Index: Include/graminit.h
===================================================================
--- Include/graminit.h	(revision 62321)
+++ Include/graminit.h	(working copy)
@@ -1,3 +1,5 @@
+/* Generated by Parser/pgen */
+
 #define single_input 256
 #define file_input 257
 #define eval_input 258
Index: Parser/printgrammar.c
===================================================================
--- Parser/printgrammar.c	(revision 62321)
+++ Parser/printgrammar.c	(working copy)
@@ -13,6 +13,7 @@
 void
 printgrammar(grammar *g, FILE *fp)
 {
+    fprintf(fp, "/* Generated by Parser/pgen */\n\n");
 	fprintf(fp, "#include \"pgenheaders.h\"\n");
 	fprintf(fp, "#include \"grammar.h\"\n");
 	printdfas(g, fp);
@@ -30,6 +31,8 @@
 {
 	dfa *d;
 	int i;
+    
+    fprintf(fp, "/* Generated by Parser/pgen */\n\n");
 	
 	d = g->g_dfa;
 	for (i = g->g_ndfas; --i >= 0; d++)