Nroff trouble - is it a BUG ?

[Russell Shilling]

I think I've discovered an error in (our) nroff.  Using the 'ms' macros,
run this test file (tmp) through with:
	nroff -ms tmp

This is the content of the test file 'tmp':
----- CUT HERE -----
.DS
.B "testy backslashes"

--------\\
	 \\
	  \\
	   \\
	    v

.DE
----- CUT HERE -----

This is the result (underline removed):
--------------------------------------------------------------

        testy backslashes

        --------(
                 (
                  (
                   (
                    v


--------------------------------------------------------------
This is not at all what I intended.

What is going on here, and how can it be fixed ?  
My arrows are getting crunched for no known reason.

If there is a way to do this using something other
than the -ms macros, that info would also be helpful.

(I'm probably the only person in the known universe
who wants to print back-slashes with nroff.)