_originally in https://github.com/tidyverse/dplyr/pull/4091#issuecomment-458610890_ The `add` argument in `group_by()` is inconsistent with `.add` arguments in `group_by_[if,at,all]()`. We should eventually have only `.add` but for a (possibly long interim) we could have both `add` and `.add = add`
originally in #4091 (comment)
The
addargument ingroup_by()is inconsistent with.addarguments ingroup_by_[if,at,all]().We should eventually have only
.addbut for a (possibly long interim) we could have bothaddand.add = add