am 2ccb564d: am 938e8b67: am d731c902: am f0380a26: am 343f581d: Merge "fix typo and clarify class references in database lesson bug: 9372560" into jb-mr1.1-ub-dev

* commit '2ccb564d8066972847d8a5e4b8820c72638134b1':
  fix typo and clarify class references in database lesson bug: 9372560