Fix lint warnings for R version
Fix lint warnings for R version

biotool-paper/biotool,drpowell/biotool,drpowell/biotool,drpowell/biotool,biotool-paper/biotool,drpowell/biotool,drpowell/biotool,biotool-paper/biotool,drpowell/biotool,biotool-paper/biotool,bionitio-team/bionitio,drpowell/biotool,lonsbio/biotool,drpowell/biotool,drpowell/biotool,lonsbio/biotool,biotool-paper/biotool,lonsbio/biotool,biotool-paper/biotool,lonsbio/biotool,drpowell/biotool,biotool-paper/biotool,biotool-paper/biotool,biotool-paper/biotool,biotool-paper/biotool