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https://issues.apache.org/jira/browse/LUCENE-3748?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13199267#comment-13199267
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Robert Muir commented on LUCENE-3748:
-------------------------------------

I think we should do it (despite the cruft).

One of these days we will realize our goal of a stable interface between 
indexwriter etc and analyzers such
that if you are really worried about this with old indexes, you just use 
lucene-analyzers-ancient-version.jar
and it works with the newer lucene-core.jar

But until then, i think we need it (e.g. we add a deprecated ctor for api 
compatibility that forwards to VERSION.LUCENE_35)
and conditionalize the handling based on Version.

If you dont want to cruft-it-up lemme know, otherwise feel free to add a patch 
:)

                
> EnglishPossessiveFilter should work with Unicode right single quotation mark
> ----------------------------------------------------------------------------
>
>                 Key: LUCENE-3748
>                 URL: https://issues.apache.org/jira/browse/LUCENE-3748
>             Project: Lucene - Java
>          Issue Type: Improvement
>          Components: modules/analysis
>    Affects Versions: 3.1, 3.2, 3.4, 3.5
>            Reporter: David Croley
>            Priority: Minor
>         Attachments: LucenePatch
>
>
> The current EnglishPossessiveFilter (used in EnglishAnalyzer) removes 
> possessives using only the '\'' character (plus 's' or 'S'), but some common 
> systems (German?) insert the Unicode "\u2019" (RIGHT SINGLE QUOTATION MARK) 
> instead and this is not removed when processing UTF-8 text. I propose to 
> change EnglishPossesiveFilter to support '\u2019' as an alternative to '\''.

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