* doc/groff.css: New file.

* doc/groff.css: New file.

* doc/webpage.ms: Use `groff.css'.
Other small fixes.

* tmac/an-old.tmac (need_eo_h): New number register.
(TH): Emit `.eo.tl' tag after title.
(SH): Set `need_eo_h'.
(an-trap): Handle `need_eo_h'.
(an-do-tag): s/HTML-TAG-NS/HTML-TAG-NEXT/.

* tmac/s.tmac (need_eo_h, need_eo_tl): New number registers.
(TL): Always start diversion.
Updated.
(@AI): Always call `par@reset'.
(@AB): Update code for -Thtml.
(cov*tl-au-print): Handle -Thtml.
(par@reset): Handle `need_eo_tl', `need_eo_h'.
(@IP): Simplified.
(@IT-html): Removed.
(@SH): Set `need_eo_h' for -Thtml.
(par@TL): s/HTML-TAG/HTMl-TAG-NS/.
Set `need_eo_tl'.
(@NH): s/HTML-TAG/HTMl-TAG-NS/.
Set `need_eo_h' for -Thtml.
(@EQ, @EN): Don't handle -Thtml specially.
(par@load-init): Don't handle -Thtml specially.

* tmac/www.tmac (www:paraspace): New macro.
(HTML-NS, HTML-TAG-NS): Use new `tag' request.
(HTML</p>, HTML-TAG-NEXT): New macros.
(HnE): Emit tag `.eo.h' instead of break.
(HR): s/HTML-NS/HTML/.
(www-end-nowhere): End diversion only if `www-html' not set.
Emit `.eo.tl' tag.
(ULS, ULE): s|HTML|HTML</p>|.
(LI): Call `www:paraspace'.
(HEAD): New macro.