Wrong gitattributes documentation?

Hi all,

I have noticed a strange behaviour when using git-lfs.

If I understood correctly, git-lfs adds patterns to .gitattributes, for 
which git then calls lfs for any matches with this pattern.

The problem is, the documentation[1] says: "The rules how the pattern 
matches paths are the same as in .gitignore files; see gitignore[5].", 
so when I have a pattern like '/images/', it should match on all 
files+folders under /images, even the directory itself, right? Or when 
I'd use '/images/*', it should match on all files+folders under /images, 
right?

This does not seem to be the case. Nothing is done by lfs when using 
'/images/', and when using '/images/*', it only takes into account files 
which are directly in /images (so it doesnt take into account 
subdirectories).

The only solution to this (until now) is to use '/images/**/*', which 
seems to do exactly what I want (lfs gets executed for all files+folders 
under /images).

Is this expected behaviour? If yes, then the documentation of 
gitattributes seems incorrect to me. If not, can this be considered as a 
bug?

I found several complaints about this to git-lfs (or other projects 
relying on gitattributes), e.g. [2], but I didn't find anything about 
this regarding gitattributes itself.

Thanks for answers
Regards
Rene

PS: $ git --version
git version 2.1.4

[1] = https://git-scm.com/docs/gitattributes
[2] = https://github.com/git-lfs/git-lfs/issues/2068