minor: step-56: consistent template arg naming
minor: step-56: consistent template arg naming

danshapero/dealii,naliboff/dealii,sairajat/dealii,danshapero/dealii,sairajat/dealii,danshapero/dealii,naliboff/dealii,sairajat/dealii,naliboff/dealii,sairajat/dealii,naliboff/dealii,sairajat/dealii,danshapero/dealii,naliboff/dealii,naliboff/dealii,danshapero/dealii,danshapero/dealii,sairajat/dealii,sairajat/dealii,danshapero/dealii,naliboff/dealii