Transformers' default for non-given tokens should be empty strings
Transformers' default for non-given tokens should be empty strings

Found while tests were being written.
eskwire/evesrp,paxswill/evesrp,eskwire/evesrp,eskwire/evesrp,eskwire/evesrp,paxswill/evesrp,paxswill/evesrp