imgdiff

        run("pnmarith $diff @pnm > $tmp");
        run("xv $tmp");
        run("rm -f $tmp @pnm") unless $LEAVE_TMP_FILES;

• I don't know why I used run("rm ...") here instead of just unlink

• $LEAVE_TMP_FILES is set by a command-line option

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Copyright © 2012 M. J. Dominus