Alan Woodward resolved LUCENE-8121.
    Resolution: Fixed

Think this can be resolved now.

> UnifiedHighlighter can highlight terms within SpanNear clauses at unmatched 
> positions
> -------------------------------------------------------------------------------------
>                 Key: LUCENE-8121
>                 URL: https://issues.apache.org/jira/browse/LUCENE-8121
>             Project: Lucene - Core
>          Issue Type: Bug
>          Components: modules/highlighter
>            Reporter: David Smiley
>            Assignee: David Smiley
>            Priority: Minor
>             Fix For: 7.3
>         Attachments: LUCENE-2287_UH_SpanCollector.patch, 
> LUCENE-2287_UH_SpanCollector.patch
> The UnifiedHighlighter (and original Highlighter) highlight phrases by 
> converting to a SpanQuery and using the Spans start and end positions to 
> assume that every occurrence of the underlying terms between those positions 
> are to be highlighted.  But this is inaccurate; see LUCENE-5455 for a good 
> example, and also LUCENE-2287.  The solution is to use the SpanCollector API 
> which was introduced after the phrase matching aspects of those highlighters 
> were developed. 

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