adjust psyntax benchmark

The psyntax implementation relies on 3-D syntax like
   (let ([s (string #\i)])
     (eq? s (eval `',s)))
producing true, or maybe
   (let ([s1 (string #\i)]
         [s2 (string #\i)])
     (eval `(eq? ',s1 ',s2)))
producing false, or probably both. Neither works now
in Racket. Hack around the problem well enough for
benchmarking purposes by using numbers in place of
strings.

collects/tests/racket/benchmarks/common/psyntax-input.txt

@@ -1,6 +1,7 @@
 ;;; Portable implementation of syntax-case
 ;;; Extracted from Chez Scheme Version 7.3 (Feb 26, 2007)
 ;;; Authors: R. Kent Dybvig, Oscar Waddell, Bob Hieb, Carl Bruggeman
+;;; Modifications to reflect "psyntax.sch": see << >>
 
 ;;; Copyright (c) 1992-2002 Cadence Research Systems
 ;;; Permission to copy this software, in whole or in part, to use this
@@ -1050,7 +1051,7 @@
 ;;; labels
 
 ;;; simple labels must be comparable with "eq?" and distinct from symbols
-;;; and pairs.
+;;; and pairs <<and preserve identity through `eval'>>
 
 ;;; indirect labels, which are implemented as pairs, are used to support
 ;;; import aliasing for identifiers exported (explictly or implicitly) from
@@ -1069,10 +1070,10 @@
   (define set-indirect-label! (lambda (x v) (set-indirect-label-label! x v))))
 
 (define gen-label
-  (lambda () (string #\i)))
+  (let ([n 0]) (lambda () (set! n (+ 1 n)) n))) ; <<changed from (string #\i)>>
 (define label?
   (lambda (x)
-    (or (string? x) ; normal lexical labels
+    (or (number? x) ; normal lexical labels <<changed to number>>
         (symbol? x) ; global labels (symbolic names)
         (indirect-label? x))))
 

collects/tests/racket/benchmarks/common/psyntax.sch

@@ -644,7 +644,7 @@
                                       (set-indirect-label-label!358
                                         x2406
                                         v2405)))
-            (gen-label362 (lambda () (string '#\i)))
+            (gen-label362 (let ([n 0]) (lambda () (set! n (+ 1 n)) n)))
             (label?363 (lambda (x2402)
                          ((lambda (t2403)
                             (if t2403
@@ -654,7 +654,7 @@
                                        t2404
                                        (indirect-label?356 x2402)))
                                   (symbol? x2402))))
-                           (string? x2402))))
+                           (number? x2402))))
             (gen-labels364 (lambda (ls2401)
                              (if (null? ls2401)
                                  '()
@@ -4908,7 +4908,7 @@
                                       e1563
                                       (anti-mark400 w1561)
                                       ae1560)))
-                                (string '#\m)))))
+                                (string #\m)))))
             (chi-body503 (lambda (body1547 outer-form1546 r1545 mr1544
                                   w1543 m?1542)
                            ((lambda (ribcage1548)