Merge branch 'ta/format-user-manual-as-an-article'

Update the way the user-manual is formatted via AsciiDoc to save
trees.

* ta/format-user-manual-as-an-article:
  user-manual: improve html and pdf formatting

Documentation/Makefile

@@ -324,7 +324,7 @@ manpage-base-url.xsl: manpage-base-url.xsl.in
 
 user-manual.xml: user-manual.txt user-manual.conf
 	$(QUIET_ASCIIDOC)$(RM) $@+ $@ && \
-	$(ASCIIDOC) $(ASCIIDOC_EXTRA) -b docbook -d book -o $@+ $< && \
+	$(ASCIIDOC) $(ASCIIDOC_EXTRA) -b docbook -d article -o $@+ $< && \
 	mv $@+ $@
 
 technical/api-index.txt: technical/api-index-skel.txt \

Documentation/user-manual.txt

@@ -1,5 +1,5 @@
 Git User Manual
-_______________
+===============
 
 Git is a fast distributed revision control system.