subunit* FILE should read that file

[Martin Pool]

subunit-filter subunit.out should filter that file, not sit there like a nong waiting for stdin. :)

[Robert Collins (lifeless)]

I think this would be fine... I suggest that all filters should do this; and they should iterate over all their positional arguments this way (subunit-filter foo bar baz quux should concatenate them all)

[Robert Collins (lifeless)]

A step that could be done to help this is to write a file-like object that takes multiple files, and manages readline() combining as each file is completed.