goreportcard (https://goreportcard.com/report/github.com/zaquestion/lab)
reports a few minor issues with lab, including a misspelling of
"separate" in several locations. This PR fixes that, and also adds a
documentation comment that was reported missing.

Imports whose package names do not match the basename of their import
path (e.g., go-gitlab, go-gitconfig) have had their package names
explicitly rendered by goimports, to more clearly identify the package
name being imported.