This has been fixed now in Babel for some time. So we can now
get rid of the ugly code that disabled language-specific shorthands
(see e26d31d).
Closes#6817.
Previously we used the `.ini` files for every language, but
for European languages these tend to provide inferior results
to the `.ldf` files used by classic Babel. Currently Babel
documentation recommends using the classic system for European
languages written in Latin and Cyrillic scripts and Vietnamese.
So the LaTeX writer and template now follow this guidance.
Main languages in the list of languages with good "classic" support
are added to global documentclass options and will be automatically
handled by Babel using the `.ldf` files.
If the main language is not in this list, the `babeloptions` variable
will be set to `provide=*`, which will cause support to be loaded from
the `.ini` file rather than an `.ldf`. So, for example, setting
`-V babeloptions=''` with a polytonic Greek document will cause the
`.ldf` support to be used instead of the `.ini`.
The default setting of this variable can be overwritten, but in most
cases the default should give good results.
Closes#8283.
+ Remove section numbering code from common.latex
+ Add section numbering to default.latex
+ Add logic for numbering sections in default.beamer. I moved the template setting
code to where other beamer templates are set. This makes the section-titles and
numbersections variables independent.
This should make --number-sections work with beamer.
+ Split out common parts of latex template into partials: common.latex,
fonts.latex, font-settings.latex, passoptions.latex, hypersetup.latex,
after-header-includes.latex.
+ Split out old latex template into default.latex and default.beamer.
+ Make default.beamer the default template for beamer.
...and only include it if `english` or `german` is used.
Since 3d8f011, the babel language is not specified as a
class option any more; so now we need to explicitly specify
the language option when we load `selnolig`. Only `german`
and `english` are valid, so we construct the variable
`selnolig-langs` in the writer and include `selnolig` if it
is nonempty.
This should restore proper ligature suppression when
lualatex is used.
Closes#9863. Supersedes #9864.
Thanks to @fkohrt for the initial fix.
If you used `lang: de-DE` but then had a span or div with `lang=de`, the
preamble would try to load `ngerman` twice, leading to an error.
This fix ensures that a language is only loaded once.
Closes#9472.
John MacFarlane