"Victoria Dye via GitGitGadget" [off-list ref] writes:

 * Added a commit to move 'struct repository' out of 'git_config_source',
   rather than creating a dummy 'config_source' just to hold a repository
   instance.
 * Changed the config setting in the new tests from 'feature.experimental'
   to 'index.sparse' to tie these changes to their intended use case.
 * "super project" -> "superproject"

Thanks! Discounting the discussions on the side thread (which we've
decided are mostly out of scope) I think this version is good enough to
merge as-is.

In

  https://lore.kernel.org/git/kl6llegnfccw.fsf@chooglen-macbookpro.roam.corp.google.com (local)

I said that this series is better if we squash in a patch to drop the
setup code from discover_git_directory(), but on hindsight, I think it
also makes perfect sense for me to send that as a standalone patch. Let
me know if you plan to squash it in or not so I'll know whether to send
it :)