problem with \eqn (PR#8322)

Your own fault. See below. It is basic LaTeX and any LaTeX person
can tell you the answer...(most probably haven't bothered...)

Full_Name: Ross Boylan
Version: 2.2.0
OS: Linux
Submission from: (NULL) (65.175.48.58)


  \eqn{{\bf\beta}_j}{b(j)} in my .Rd file produces this error

--------------------------------------------
! Missing $ inserted.
<inserted text> 
                $
l.7 \eqn{{\bf\beta}_j}{\bf\beta}_
                                 jnormal-bracket5bracket-normal{b(j)}

\eqn{{\bf\beta}_j} is already syntactically complete, so latex
complains the next "_" is not in maths mode, and automatically
switch into maths mode for you (the $ inserted message) You have
to match all the braces - you need 3 right-braces after \eqn,
like this, at least:

\eqn{  {  {\bf\beta
           }_j
        }
        {\bf\beta
        }_ ....
        {b(j)
        }
     }