Given that this patch has been added to the last commitfest for v12, I think we should mark it as targeting 13, so it can be skipped over by people looking to get things into v12. Even leaving fairness aside, I don't think it's likely to be ready quickly enough...
Obviously this patch is nowhere near the importance of most patches slated for v12, but I would hope it can be considered, time permitting.
The size of the patch may look large (1036 lines), but 650+ of that is pure documentation changes, ~50 lines of added autocomplete strings, ~140 lines are added TailMatches calls (one per new autocomplete string), and what remains is strncmp() calls to match those same strings, so it's pretty mild in terms of impact.
