\ before ' !!?

Hey, c'mon guys, if it ain't broke don't fix it, ok?

[jar <at> ashby trunk]$ scheme48
Welcome to Scheme 48 1.4 (made by root on Thu Jan 11 12:47:50 EST 2007)
Copyright (c) 1993-2006 by Richard Kelsey and Jonathan Rees.
Please report bugs to scheme-48-bugs <at> s48.org.
Get more information at http://www.s48.org/.
Type ,? (comma question-mark) for help.
 > "foo'bar"
"foo'bar"
 > ,exit
[jar <at> ashby trunk]$ ../build/external/scheme48-1.8/go
Welcome to Scheme 48 1.8 (made by jar on Sun May  4 15:16:30 EDT 2008)
Copyright (c) 1993-2008 by Richard Kelsey and Jonathan Rees.
Please report bugs to scheme-48-bugs <at> s48.org.
Get more information at http://www.s48.org/.
Type ,? (comma question-mark) for help.
 > "foo'bar"
"foo\'bar"
 > "foo\'bar"

Error: invalid escaped character in string
        #\'
        (&i/o-port-error (port . #{Input-port #{Input-channel  
"standard input"}}))
        (&i/o-read-error (port . #{Input-port #{Input-channel  
"standard input"}}))
 >