Netflix/RxJava — pull request #201 by benjchristensen (2013-03-19 23:22:56+00:00)
Title: Synchronize Observer on OperationMerge

fix for Merge serialization bug reported in https://github.com/Netflix/RxJava/issues/200

This is necessary because by definition Merge is subscribing to multiple sequences in parallel and is supposed to serialize them into a single Observable.