minor edit to test 12
class diagram and txt descriptions
Revert "class diagram and txt descriptions"

This reverts commit 936afb34031714580ed9482dfaaeb11349f2290b.
Revert "Revert "class diagram and txt descriptions""

This reverts commit a1c49c2c3d90ba852ccb663cbe1bde71170c979d.
Revert "Revert "Revert "class diagram and txt descriptions"""

This reverts commit c12a9b9f92640514c15035fcf762e09bf217b973.
Merge branch 'wien'