GitHub user hhbyyh opened a pull request:

    https://github.com/apache/spark/pull/16103

    [SPARK-18374][ML]Incorrect words in StopWords/english.txt

    ## What changes were proposed in this pull request?
    
    Currently English stop words list in MLlib contains only the argumented 
words after removing all the apostrophes, so "wouldn't" become "wouldn" and 
"t". Yet by default Tokenizer and RegexTokenizer don't split on apostrophes or 
quotes.
    
    Adding original form to stop words list to match the behavior of Tokenizer 
and StopwordsRemover. Also remove "won" from list.
    
    see more discussion in the jira: 
https://issues.apache.org/jira/browse/SPARK-18374
    
    ## How was this patch tested?
    existing ut
    


You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/hhbyyh/spark addstopwords

Alternatively you can review and apply these changes as the patch at:

    https://github.com/apache/spark/pull/16103.patch

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #16103
    
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commit efeae8c8ab57ef77f9d8fd240e6ef9af626f947a
Author: Yuhao <yuhao.y...@intel.com>
Date:   2016-11-30T23:38:52Z

    add stop words

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