Highlighting overlapping tokens outputs doubled words
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                 Key: LUCENE-2874
                 URL: https://issues.apache.org/jira/browse/LUCENE-2874
             Project: Lucene - Java
          Issue Type: Bug
            Reporter: Pierre Gossé


If for the text "the fox did not jump" we generate following tokens :
(the, 0, 
0-3),({fox},0,0-7),(fox,1,4-7),(did,2,8-11),(not,3,12,15),(jump,4,16,18)

If TermVector for field is stored WITH_OFFSETS and not WITH_POSITIONS_OFFSETS, 
highlighing would output
"the<em>the fox</em> did not jump"

I join a patch with 2 additive JUnit tests and a fix of TokenSources class 
where token ordering by offset did'nt manage well overlapping tokens.


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