On Thu, Feb 9, 2017 at 5:27 AM, Michael Haggerty <mhag...@alum.mit.edu> wrote:
> The old practice of storing the empty string in this member for the main
> repository was a holdover from before 00eebe3 (refs: create a base class
> "ref_store" for files_ref_store, 2016-09-04), when the submodule was
> stored in a flex array at the end of `struct files_ref_store`. Storing
> NULL for this case is more idiomatic and a tiny bit less code.
>
> Signed-off-by: Michael Haggerty <mhag...@alum.mit.edu>
> ---

Makes sense!
Stefan

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