Merge branch 'adv' into 'master'

Adv

See merge request picasoft/apis/h19/init/linuxadv!7
2 jobs for master in 16 seconds (queued for 2 seconds)
Name Stage Failure
failed
beamer-build Build
! Emergency stop.
\endframe ->\egroup
\begingroup \def \@currenvir {frame}
l.9 \end{frame}

! ==> Fatal error occurred, no output PDF file produced!
Transcript written on main.log.
make: *** [makefile:2: all] Error 1
ERROR: Job failed: exit code 1