* Fix backwards selection duplication widening bug
* Add integration tests
* Make tests line-ending agnostic
Make tests line-ending agnostic
Use indoc to fix tests
Fix line-ending on test input
During write-quit, if the file fails to be written for any reason, helix
will still quit without saving the changes. This fixes this behavior by
introducing fallibility to the asynchronous job queues. This will also
benefit all contexts which may depend on these job queues.
Fixes#1575