for the literal \fB\-foo\fP:
.sp
.EX
    rg \-e \-foo
.EE
.sp
You can also use the special \fB\-\-\fP delimiter to indicate that no more
flags will be provided. Namely, the following is equivalent to the above:
.sp
.EX
    rg \-\- \-foo
.EE
.sp
When \flag{file} or \flag{regexp} is used, then ripgrep treats all positional
arguments as files or directories to search.