Fix HTML rules and input.

Makefile

@@ -48,12 +48,13 @@ clean:
 check: advent
 	cd tests; $(MAKE) --quiet
 
+.SUFFIXES: .adoc .html
+
 # Requires asciidoc and xsltproc/docbook stylesheets.
-.asc.6: advent.adoc
+.adoc.6: advent.adoc
 	a2x --doctype manpage --format manpage $<
-.asc.html: advent.adoc
-	a2x --doctype manpage --format xhtml -D . $<
-	rm -f docbook-xsl.css
+.adoc.html: advent.adoc
+	asciidoc $<
 
 advent-$(VERS).tar.gz: $(SOURCES) advent.6
 	tar --transform='s:^:advent-$(VERS)/:' --show-transformed-names -cvzf advent-$(VERS).tar.gz $(SOURCES) advent.6

history.adoc

@@ -69,6 +69,7 @@ he replied on 15 May giving both permission and encouragement.
 Here is what Don said about differences between the original Adventure
 and 2.5:
 
+............................................................................
 > The bulk of the points come from five new 16-point treasures.  (I say "bulk"
 > because I think at least one of the scores included some padding and I may
 > have tweaked those.)  Each of the new treasures requires solving a puzzle
@@ -105,6 +106,7 @@ and 2.5:
 > succumb even given access to the game source.  You really need to fit
 > together not only the goals and the map and use of inventory space, but
 > also details like just what _can_ you do in the dark...?
+............................................................................
 
 == Nomenclature ==
 
@@ -145,6 +147,6 @@ which is then linked to the advent binary.
 
 - [[[IFA]]] http://rickadams.org/adventure/
 
-- [[[[DA]]] http://www.filfre.net/sitemap/
+- [[[DA]]] http://www.filfre.net/sitemap/
 
 - [[[SN]]] http://www.digitalhumanities.org/dhq/vol/1/2/000009/000009.html