[Bug-mit-scheme] x11 graphics doesn't quite work.

[Gerald Jay Sussman]

By the way, did you intend that the value returned by DEFINE is now
unspecified rather than the symbol that is being defined?

Here is a transcript of the difference.

   Image saved on Saturday May 17, 2014 at 2:39:25 AM
     Release 9.2 || Microcode 15.3 || Runtime 15.7 || SF 4.41 || LIAR/x86-64 
4.118 || Edwin 3.116
     SOS 1.8     || IMAIL 1.21

   (define (foo x)
     (+ x 3))
   ;Value: foo


but in 10.1.4 we get:

   Image saved on Sunday January 6, 2019 at 6:10:24 PM
     Release 10.1.4    || Microcode 15.3 || Runtime 15.7 || SF 4.41
     LIAR/x86-64 4.118 || SOS 1.8        || XML 1.0      || Edwin 3.117
     X11 1.2           || X11-Screen 1.0 || IMAIL 1.22

   (define (foo x)
     (+ x 3))
   ;Unspecified return value