Log Message:
tex-babel{,-doc}: update to 3.89

3.89
* Deprecating \SetCase, \aliasshorthands, and 'strings' package
  option in the manual.
* The manual has been split in two documents: 'babel.pdf' is the
  user guide, and 'babel-code.pdf' is the code.
* Alternative syntax to pass 'modifiers' to babel languages.
* Code cleaned up: babel.def has been shortened dramatically,
  and babel.sty is a bit smaller.

3.88
* 37 new locale files: Abkhazian, Afar, Atsam, Baluchi, Bhojpuri,
  Blin, Corsican, Erzya, Ga, Geez, Guarani, Haryanvi, Inuktitut,
  Jju, Ligurian, Muscogee, Northern Sotho, Nyanja, N’Ko,
  Papiamento, Prussian, Rajasthani, Saho, Sicilian, Silesian,
  South Ndebele, Southern Sotho, Swati, Taroko, Tigre, Tok Pisin,
  Tsonga, Tswana, Tyap, Venda, Volapük, Wolaytta.
* Fixed a few month names in Greek locales (thanks to Günter Milde).
* New hook 'begindocument'.
* Feature preview: option 'casing' in '\babelprovide' (requires a
  future change in the LaTeX kernel).