What roff macros does this use?

[Jay M. Libove]

Can someone tell me what set of /usr/lib/tmac/tmac.* macros the following
runoff text (the first twenty lines from the publicly distributable "file"
replacement command from Ian Darwin [ sorry, don't have his address ] )
uses? I've tried "an", "m", "n", "s", and default, and none generate
a reasonable display format.

Here it is...

..TH FILE 1 "Copyright but distributable"
..SH NAME
..I file
\- determine file type
..SH SYNOPSIS
..B file
[
..B -c
]
[
..B -f
namefile ]
[
..B -m 
magicfile ]
file ...
..SH DESCRIPTION
..I File
tests each argument in an attempt to classify it.
There are three sets of tests, performed in this order:


Thanks!
------------- 
Jay Libove		jl42 at andrew.cmu.edu, libove at cs.cmu.edu,
5731 Centre Ave, Apt 3	gateway.sei.cmu.edu!libove!libove, jl42 at andrew.BITnet,
Pittsburgh, PA 15206	jl42 at drycas.BITnet, psuvax1!pitt!darth!libove!libove,
(412) 362-8983		or uunet!nfsun!libove!libove