Embedding native PostScript in a \markup block

PostScript code can be directly inserted inside a \markup block.

\version "2.24.0"

% PostScript is a registered trademark of Adobe Systems Inc.

\relative c'' {
  a4-\markup { \postscript "3 4 moveto 5 3 rlineto stroke" }
  -\markup { \postscript "[ 0 1 ] 0 setdash 3 5 moveto 5 -3 rlineto stroke " }

  b4-\markup { \postscript "3 4 moveto 0 0 1 2 8 4 20 3.5 rcurveto stroke" }
  s2
  a'1
}