Standard Tokenizer doesn't recognise I.B.M as Acronym, it requires it ends with 
a dot i.e I.B.M.
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                 Key: LUCENE-1787
                 URL: https://issues.apache.org/jira/browse/LUCENE-1787
             Project: Lucene - Java
          Issue Type: Improvement
          Components: Analysis
    Affects Versions: 2.9
            Reporter: Paul taylor


Standard Tokenzizer doesn't recognise I.B.M it requires it end with a dot i.e 
I.B.M. This is particulary problematic if I.B.M is added tot the index, with 
the StandardAnalyser it will get added as  IBM , a search for I.B.M will not 
match because I.B.M will be left as is, I would expect a match in this scenario

I think it could be fixed by modifying the  grammar ACRONYM_DEP  in 
StandardTokenizerImpl.jflex so that it also supports

{ALPHANUM} ("." {ALPHANUM})+

dot only required between each character, (I'm not familiar with jflex syntax )



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