spaces instead of tabs [#2134]
sensible test suite for inheriting extras via changeParent() should be complete [#2134]
clean up code to reduce IDE warnings [#2134]
added an option to duplicate() to indicate whether the concrete part should be copied too ($abstract_only) [#2134]
when inheriting an extra, duplicate only the abstract part and set the origin uid manually [#2134]
Merge remote-tracking branch 'origin/master' into #2134