minor changes
minor changes

AndreasFMueller/SeminarQM,bgaechter/SeminarQM,bgaechter/SeminarQM,PStump/SeminarQM,Eisenbahn5/SeminarQM,PStump/SeminarQM,gabriellooser/SeminarQM,Ox11/SeminarQM,hdiethelm/SeminarQM,dns2utf8/SeminarQM,Eisenbahn5/SeminarQM,joelbrunner/SeminarQM,dns2utf8/SeminarQM,dns2utf8/SeminarQM,hdiethelm/SeminarQM,joelbrunner/SeminarQM,gabriellooser/SeminarQM,AndreasFMueller/SeminarQM,Ox11/SeminarQM