Avoid creation of empty nodes when nodes are optional. Output for 'Thesis' is no longer empty (uses same formatting as 'Report').
Avoid creation of empty nodes when nodes are optional.
Output for 'Thesis' is no longer empty (uses same formatting as 'Report').

inveniosoftware/invenio-formatter,tiborsimko/invenio-formatter,inveniosoftware/invenio-formatter,inveniosoftware/invenio-formatter,tiborsimko/invenio-formatter,tiborsimko/invenio-formatter