Merged revision(s) 1461409 from lucene/dev/trunk:
LUCENE-4887: NoOutputs implements merge.  Lets FSA behave like a Set<Input>
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git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/branch_4x@1461410 13f79535-47bb-0310-9956-ffa450edef68