Note on the first line #10
Description
Generic postscript file:
%!PS
This is not used by the PS interpreter! It is read by tools other than PS.
File that conforms to DSC 3.0:
%!PS-Adobe-3.0
File that is always included into other files:
Nothing is needed. The file is never intended for execution all by itself.
It will be the caller's job to ensure the final program, assembled from parts, has the desired first line.
%!PS is okay, but not really needed. It's very unlikely the included file will be at the start of the "complete" program.
I would consider it in bad taste to put %!PS-Adobe-3.0 at the start of an included file, when it never appears at the start of the program.