complete-771992: Calculate isIncompleteName
complete-771992: Calculate isIncompleteName

We were passing it in as a parameter, but this is both unnecessary and
wrong. We can calculate depending on an opening '-' and assuming that all
params left over at the end are not incompleteNames is wrong.

mozilla/gcli,joewalker/gcli,mozilla/gcli,joewalker/gcli,mozilla/gcli