Restored 0.92.1 release behaviour of being able to search for e.g. U(1).
Restored 0.92.1 release behaviour of being able to search for e.g. U(1).

tiborsimko/invenio-search,inveniosoftware/invenio-search,tiborsimko/invenio-search,tiborsimko/invenio-records,inveniosoftware/invenio-records,tiborsimko/invenio-records,inveniosoftware/invenio-records,inveniosoftware/invenio-search