-it is likely (although as yet unimplemented in Puzzles) that the
-same API implementation can handle both drawing and printing; but on
-Unix, the most common way for applications to print is by producing
-PostScript output directly, and although it would be \e{possible} to
-write a single (say) \cw{draw_rect()} function which checked a
-global flag to decide whether to do GTK drawing operations or output
-PostScript to a file, it's much nicer to have two separate functions
-and switch between them as appropriate.
+the same API implementation can handle both drawing and printing;
+but on Unix, the most common way for applications to print is by
+producing PostScript output directly, and although it would be
+\e{possible} to write a single (say) \cw{draw_rect()} function which
+checked a global flag to decide whether to do GTK drawing operations
+or output PostScript to a file, it's much nicer to have two separate
+functions and switch between them as appropriate.