ls -files missing from git-completion-list

[Ντέντος Σταύρος]

I have install the latest git version from the PPA:
$ git --version
git version 2.20.1
$ lsb_release -rd
Description: Ubuntu 16.04.5 LTS
Release: 16.04

Running 
`https://github.com/git/git/blob/master/contrib/completion/git-completion.bash#L2898`
does not give ls-files

$ git --list-cmds=list-mainporcelain,others,nohelpers,alias,list-complete,config
| grep ls
$

Ντέντος Σταύρος