- Rewrite documentation for set-lookup-handlers!
- Remove opening lookup targets in other-window; sorry, but there is no
consistent, stable way to do this, when many jump handlers are
asynchronous. If you want to open a jump target in another window,
create a split beforehand.
- Add support for jump handlers returning 'fail or 'deferred
- Fix xref backends when using async UIs like ivy or helm
- Conditionalize creating a better-jump jump point, and create it in the
spot we jumped *from*, not where we jumped *to*.
d17764366e