<datatype extension="newick" type="galaxy.datatypes.data:Newick" display_in_upload="true"/> <datatype extension="nhx" type="galaxy.datatypes.data:Newick" subclass="true" display_in_upload="true"/>
master
is updated when a new release is tagged, but not kept in sync with the corresponding release_XX.XX
branch until someone asks for it. We could do a better job here (e.g. automate syncing), but for the time being my suggestion above should give you a smoother experience.