1@c This file is designed to be included in manuals that use
2@c expandargv.
3
4@item @@@var{file}
5Read command-line options from @var{file}.  The options read are
6inserted in place of the original @@@var{file} option.  If @var{file}
7does not exist, or cannot be read, then the option will be treated
8literally, and not removed.
9
10Options in @var{file} are separated by whitespace.  A whitespace
11character may be included in an option by surrounding the entire
12option in either single or double quotes.  Any character (including a
13backslash) may be included by prefixing the character to be included
14with a backslash.  The @var{file} may itself contain additional
15@@@var{file} options; any such options will be processed recursively.
16