"git grep --no-index" doesn't do what it says on the tin?

Hi,

From "git help grep":

      --no-index
           Search files in the current directory that is not managed by Git.

       --untracked
           In addition to searching in the tracked files in the working tree,
           search also in untracked files.

From the description above I would think that "git grep --no-index"

and "git grep --untracked" would behave differently, but it seems like
their behavior is the same:

        $ cd ~/src/git
        $ echo superman >> git.c
        $ echo superman >> foo.txt
        $ git grep --no-index superman
        foo.txt:1:superman
        git.c:588:superman
        $ git grep --untracked superman
        foo.txt:1:superman
        git.c:588:superman

I would expect the following behavior for "git grep --no-index":

        $ git grep --no-index superman
        foo.txt:1:superman
        $

That is, it won't search inside files that are managed by git.

nazri