ptx -i ignore_file doesn't appear to work

[Graig McHendrie]

Using a command such as "ptx -i if.txt -r -f MS_OS_clips.txt > out.txt", 
where "if.txt" is a file with one word to a line, such as:
a
and
the
with
produces permuted output that includes "a", "and", "the", and "with" as 
key words.

Putting a copy of if.txt at either /usr/local/lib/eign or /usr/lib/eign 
and leaving off the "-i if.txt" option produces the same erroneous output.

I can send a zip file of "if.txt" and "MS_OS_clips.txt" if you'd like.

Graig McHendrie