racket/gui: fix reporting of numpad Enter as 'numpad-enter

On Unix and Mac OS X, the key has long been reported as #\u3,
even though the documentation says 'numpad-enter.

A more compatible change would be to adjust the documentation and
also change DrRacket and the framework to recognize #\u3 instead
of 'numpad-enter. But there doesn't seem to be a good reason to
treat #\u3 as "numpad Enter" --- particularly as opposed to treating
it as "Ctl-C" --- other than ancient Mac history.

On Windows, numpad Enter continues to be reported as #\return,
since Windows event handling doesn't naturally or easily distinguish
the two keys.

original commit: 7d388a0795cd42e12e0ff3431d744c0bb89ac37b

pkgs/gui-pkgs/gui-doc/scribblings/gui/key-event-class.scrbl

@@ -175,8 +175,7 @@ The special key symbols attempt to capture useful keys that have no
 
  @item{@racket[#\return] --- the Enter or Return key (on all
       platforms), but not necessarily the Enter key near the numpad
-      (which is reported as @racket['numpad-enter] if the platform
-      distinguishes the two Enter keys)}
+      (which is reported as @racket['numpad-enter] Unix and Mac OS X)}
 
  @item{@racket[#\tab] --- the tab key}
 
@@ -206,7 +205,11 @@ On Windows, when the Control key is pressed without Alt, the key
 
 See also @method[key-event% get-other-shift-key-code].
 
-}
+@history[#:changed "6.1.0.8" @elem{Changed reporting of numpad Enter
+                                   to @racket['numpad-enter] as
+                                   documented, instead of
+                                   @racket[#\u03].}]}
+
 
 @defmethod[(get-key-release-code)
            (or/c char? key-code-symbol?)]{

pkgs/gui-pkgs/gui-lib/mred/private/repl.rkt

@@ -26,7 +26,7 @@
 	(override*
          [on-char (lambda (c)
                     (super-on-char c)
-                    (when (and (memq (send c get-key-code) '(#\return #\newline #\003))
+                    (when (and (memq (send c get-key-code) '(#\return #\newline numpad-enter))
                                (not locked?))
                       (set! locked? #t)
                       (evaluate (get-text prompt-pos (last-position)))))])

pkgs/gui-pkgs/gui-lib/mred/private/wx/cocoa/keycode.rkt

@@ -42,7 +42,7 @@
          (#x4b . divide)
          (71 . separator)
          (65 . decimal)
-         (76 . #\u3) ; numpad enter
+         (76 . numpad-enter) ; was #\u3 in earlier versions
          (82 . numpad0)
          (83 . numpad1)
          (84 . numpad2)

pkgs/gui-pkgs/gui-lib/mred/private/wx/gtk/keycode.rkt

@@ -23,7 +23,7 @@
          (#xff63 . insert)
          (#xff80 . #\space) ; keypad
          (#xff89 . #\tab) ; keypad
-         (#xff8d . #\u3)  ; enter
+         (#xff8d . numpad-enter) ; was #\u3 in earlier versions
          (#xff91 . f1)
          (#xff92 . f2)
          (#xff93 . f3)

pkgs/gui-pkgs/gui-lib/mred/private/wxme/keymap.rkt

@@ -75,7 +75,7 @@
         ("numpad7" . numpad7)
         ("numpad8" . numpad8)
         ("numpad9" . numpad9)
-        ("numpadenter" . #\u3)
+        ("numpadenter" . numpad-enter)
         ("f1" . f1)
         ("f2" . f2)
         ("f3" . f3)

pkgs/gui-pkgs/gui-lib/mred/private/wxme/text.rkt

@@ -629,7 +629,7 @@
           [(add) (ins #\+)]
           [(subtract) (ins #\-)]
           [(decimal) (ins #\.)]
-          [(#\u3) (ins #\return)] ; NUMPAD-ENTER
+          [(numpad-enter) (ins #\return)]
           [(#\return #\tab) (ins code)]
           [else
            (let ([vcode (if (char? code)

pkgs/gui-pkgs/gui-lib/mred/private/wxtextfield.rkt

@@ -90,7 +90,7 @@
            (let ([c (send e get-key-code)])
              (unless (and (or (eq? c #\return) 
                               (eq? c #\newline)
-                              (eq? c #\u3)) ; numpad enter
+                              (eq? c 'numpad-enter))
                           return-cb
                           (return-cb (lambda () (callback 'text-field-enter) #t)))
                (as-exit (lambda () (super-on-char e)))))))]