Flake8 fix
Flake8 fix

rafaeldelucena/waterbutler,CenterForOpenScience/waterbutler,RCOSDP/waterbutler,felliott/waterbutler,cosenal/waterbutler,TomBaxter/waterbutler,Johnetordoff/waterbutler,icereval/waterbutler,Ghalko/waterbutler,kwierman/waterbutler,hmoco/waterbutler,rdhyee/waterbutler,chrisseto/waterbutler