No longer print field separator if field has not a subfield with specified subcode.
No longer print field separator if field has not a subfield with specified subcode.

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