Correction to display affecting journalism

The stylesheet was causing an irregular display for footnotes that
appeared within postscripts to correspondence (e.g.,
http://www.whitmanarchive.org/published/periodical/journalism/tei/per.00210.html),
such that the text of the footnotes appeared both in the postscript
and in the footnotes section. I have fixed the problem so that the
footnote anchor appears in the postscript and the text of the footnote
itself appears in the appropriate footnotes section.

--Liz