Re: [PATCH v2] checkout: optimize "git checkout -b <new_branch>"

Ben Peart [off-list ref] writes:

The biggest change in this version was suggested in feedback to the last
patch.  I have turned on the optimzation by default if sparse-checkout is
not on so that most users do not have to set anything and they will get the
benefit of the optimization.

Sounds like a good thing to do.

If we missed something in the logic of skip_merge_working_tree(),
the breakage may affect more unsuspecting people, which may or may
not be a bad thing---at least it would allow us to notice it sooner.

+	When set to true, "git checkout -b <new_branch>" will not update the
+	skip-worktree bit in the index nor add/remove files in the working
+	directory to reflect the current sparse checkout settings.

This reads a lot clearer, at least to me, than the documentation
update in the previous round, by speaking in terms of what the
user-visible side effect of this setting would be.

Nicely done.  Thanks.