Two affiliations for one author
Seems to work already as in: https://preprints.inggrid.org/repository/view/20/
Request:
Add example on how to do it in https://git.rwth-aachen.de/inggrid/template/-/blob/master/metadata/authors.tex
Problem:
affiliation = {WZL,IPT}
results in empty affiliation
affiliation = WZL, affiliation = IPT,
results in only the second one being listed.