[GitHub] spark issue #20248: [SPARK-23058][SQL] Fix non printable field delim issue

[wangyum]

Github user wangyum commented on the issue:

    https://github.com/apache/spark/pull/20248
  
    [Non printable characters](http://www.theasciicode.com.ar/):
    <img width="812" alt="non-printable" 
src="https://user-images.githubusercontent.com/5399861/34880068-33152b7a-f7ea-11e7-8203-570e61c7a21c.png";>



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