image for results.txt example

[dcasciotti]

By default, 'file' is written in the MIFF image format. To
specify a particular image format, precede the filename with an image
format name and a colon (i.e. ps:image) or specify the image type as
the filename suffix (i.e. image.ps). Specify 'file' as '-' for
standard input or output.
import: delegate library support not built-in '' (X11) @ error/import.c/ImportImageCommand/1297.