Re: Roman numerals in my number sequence

[Adam Good]

Another tree to bark up and on a similar note, how to set roman
numerals in Score.markFormatter as rehearsal marks via \mark \default
...

\version "2.12.3"

\relative c' {
  \set Score.markFormatter = #(fancy-format #f "address@hidden" 1)

  \mark \default
  a b c d

  \mark \default
  a b c d
}

gives:

warning: type check for `markFormatter' failed; value `"I."' must be
of type `procedure'