More suggestions for NR 6

[Carl D. Sorensen]

Section NR 6.4.3, at the end of known issues and warnings, should add the
following:

"One workaround for this problem is to put the arguments into a Scheme list:

#(define-markup-command (foo layout props
                         arg-list)
                        (pair?)
  ...)

You could then apply it as

\markup \foo #'(1 "bar" 2 "baz")




Thanks,

Carl