http://luc.lino-framework.org/blog/2018/1029.html
http://luc.lino-framework.org/blog/2018/1029.html

lsaffre/lino_book,lino-framework/book,lsaffre/lino_book,lino-framework/book,lsaffre/lino_book,lino-framework/book,lino-framework/book