file will automatically be written out at the completion of the drawing.
If it is not specified, a default filename of lyap.out is used and only
written if the 'f' or 'F' keys are pressed during a run. The format of the
-output file is PPM for color and PGM for monochrom. The parameters used to
+output file is PPM for color and PGM for monochrome. The parameters used to
calculate the picture are included as comments at the beginning of the output
file.
.TP