Re: [PATCH v3] completion: add new _GIT_complete helper

> This is what I propose:
>
> 1) We name the new function __git_complete; this would be a temporary
> name, the function would not be meant to be public
> 2) We discuss later what would be the namespace for public functions,
> and rename, or add wrappers for them (e.g. _GIT_ps1, _GIT_complete)
> 3) We standardize the odd functions: __gitdir -> __git_dir