Log Message:
Update to 3.12.0:

3.12.0
======
* Updated translations:
  fr    (Luc Pionchon)

3.11.90
=======
* Added "hidden" style hint on page and section titles
* Added "norwich" style on links elements

3.11.5
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* Use <kdb> to fix DocBook keycap styling, #709943
* Removed the completely unused code watermark image
* Made Mallard transform robust against multiple desc elements
* Updated translations:
  zh_CN    (Wylmer Wang)

3.11.4
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* Don't assign ARIA role "button" for expander headers, #719571

3.11.1
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* Added common template html.syntax.class for syntax brush
* Only check for xmllint/xsltproc when needed, #700670

3.10.1
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* Fixed use of links styles on page and section elements

3.10.0
======
* Updated translations:
  tg    (Victor Ibragimov)

3.9.90
======
* Added support for DocBook conditional processing
* Fixed RTL issues in link trails for Mallard, DocBook, and DITA
* Added "lead" style hint for paragraphs in Mallard and DocBook
* Allow experimental role attribute on Mallard links element
* Updated translations:
  ja    (Jiro Matsuzawa)

3.9.1
=====
* Style work on previous and next links
* Use fixed positioning for ui overlays
* Use nicer close buttons on ui overlays (Jakub Steiner)
* Added html.class.attr and html.class.attr.mode
* Fixed issued with HTML tables in DocBook
* Added "center" and "button" style hints to links element
* Updated translations:
  cs    (Marek Černocký)