default --ignore file, /usr/local/lib/eign. That file has never been used.
Reported by Eric Blake.
end of line separation of words is not subject to the value of the
@option{-S} option.
-There is a default Ignore file used by @command{ptx} when this option is
-not specified, usually found in @file{/usr/local/lib/eign} if this has
-not been changed at installation time. If you want to deactivate the
-default Ignore file, specify @code{/dev/null} instead.
-
@item -o @var{file}
@itemx --only-file=@var{file}