Merge branch 'fix/examples-doc' into 'master'

[examples][doc] Update code documentation of examples

See merge request !2747

(cherry picked from commit c90ef226)

1d97ea3a [examples][doc] Update code documentation of examples
5 jobs for !2750 with cherry-pick-c90ef226
latest detached
Status Name Job ID Coverage
  Trigger
manual full-dune-2.7-clang
manual full-dune-2.7-gcc
manual full-dune-master-gcc
manual minimal-dune-2.7-gcc
 
  Downstream Modules
created trigger lecture