drio@bcm-59-127 ~/dev/git_repo/testgit $ git status
# On branch master
# Changes to be committed:
#   (use "git reset HEAD <file>..." to unstage)
#
#       modified:   foo.txt
#
drio@bcm-59-127 ~/dev/git_repo/testgit $ git add -p
usage: git-add [-n] [-v] [-f] [--interactive | -i] [-u] [--refresh] [--] <filepattern>...