tty prescan bug

[Kent M. Pitman <KMP at MIT-MC>]

If a comment ends in an odd number of slashes, the tty prescan will assume
that the end of the comment is being "quoted" away and will scan the following
line as part of the comment rather than as comment text. The bug is in that
(#/; . #\newline) is in the TTYSCAN-STRINGERS/| list, which assumes that the
"/" char is allowed for quoting. I doubt this can be fixed easily. I just
point it out mostly just so maintainer types know the bug exists in case it
ever causes someone confusion.