/usr/share/doc/pmw/examples/ex19 is in pmw-doc 1:4.27-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 | notime
unfinished
draw triangle
3 -4 moveto @ move to apex
-3 -6 rlineto @ line to bottom left
6 0 rlineto @ horizontal line to bottom right
-3 6 rlineto @ line back to apex
fill @ fill it in (solid triangle)
enddraw
[stave 1 treble 1]
c'f [draw triangle] g a | c'-b- [draw triangle] a-g- fg |
[endstave]
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