exec git init
exec git config user.email i@example.com
exec git config user.name someone
exec git checkout -b main

exec git add file

exec git status --porcelain --branch
stdout '## No commits yet on .+\nA  file'

env WANT_STATUS='NumStaged=1 IsInitial=true LocalBranch=main State=Default'
gitstatus
! stderr .

-- file --
line1
line2