nroff -mm macro question

[Jeff Burch]

I am using the MM macro package for nroff and need to know the trick to
escape a back slash for a ".VL" label. For example:

My nroff source looks like:

   .VL 20

   .LI "/test\.[Ch]"
   This regular expression will search for the string "test.C" or
   "test.h".  Note: the "\" is used to escape the ".", otherwise ...

   .LE

I want this to be formatted like:

   /test\.[Ch]    This regulare expression will search for the "test.C" or
                  "test.h". Note: ...

However, the command "nroff -mm <file>" gives:

   /test.[Ch]     This regulare expression will search for the "test.C" or
                  "test.h". Note: ...

I have tried putting "\\" or "\\\" rather than "\" on the ".LI" line
without any luck.

Any clues?

	Thanks,

	Jeff Burch
	Optical Electronics Division, San Jose, CA.
	jeff at hpoemb.hp.com
	telnet 435-4657

For the nroff macro experts, here are the definitions from
/usr/lib/macros/mmn


.deVL
.if\\n(.$<1 .)D "VL:missing arg"
.ie\\n(.$<3 .LB 0\\$1 0\\$2 0 0
.el.LB 0\\$1 0\\$2 0 0 \& 0 1
..



.deLI 
.if!\\n(:g .)D "LI:no lists active" 
.if(\\n(:g<=\\n(Ls)&(\\n(:f>0) .SP
.in\\n(:bu
.if\\n(:F 'in 0
.if(\\n(:f>0)&(\\n(:D<1) .ne2v
.ds}0 \\*(]g
.if\\n(:e .ds }0 \\n+(:a.
.if\\n(:e-1 .ds }0 \\n(:a)
.if\\n(:e-2 .ds }0 (\\n(:a)
.if\\n(:e-3 .ds }0 [\\n(:a]
.if\\n(:e-4 .ds }0 <\\n(:a>
.if\\n(:e-5 .ds }0 {\\n(:a}
.if\\n(.$-1 .ds }0 \\$1\ \\*(}0
.if\\n(.$=1 .ds }0 \\$1
.nr;0 \w\\*(}0
.nr;1 \\n(:c
.if\\n(:d .nr ;1 \\n(:bu-\\n(:du-\\n(;0u
.if!\\n(;1 .nr ;1 0
.nr;0 \\n(:bu-\\n(;1u-\\n(;0u
.ti\\n(;1u
.if!\\n(;0 .nr ;0 \w u
.if\w\\*(}0 \&\\*(}0\h\\n(;0u\&\c
..


.deLE
.if(\\n(:I>1)&(\\n(nl-\\n(:J) .nr :I 0
.if\\n(:I<2 .nr :I 0
.ie\\n(:g<1 .)D "LE:mismatched"
.el.)B
.if(\\n(:g<=\\n(Ls)&(\\n(.$>0) .SP
.nr:J \\n(nl
..


How in the heck does one learn how to read these macros???