akka/akka — pull request #1740 by patriknw (2013-09-17 13:53:13+00:00)
Title: =clu #3608 Simplify Reachability merge

* No need to merge the individual rows for one observer, simply pick
the rows from the observer with highest version

Thank you @bantonsson for noticing this opportunity

I have run the tests a few times with a runtime check to verify that old and new impl yield same results.