Minor bug in CSV serialization of SPARQL result sets

[Ian Emmons]

In the class com.hp.hpl.jena.sparql.resultset.CSVOutput, the following method 
appears:

   private String csvSafe(String str)
   {
      str = str.replaceAll("\"", "\"\"") ; 

      if ( str.contains(",") )
         str = "\""+str+"\"" ; 
      return str ;
   }

In order to support the full breadth of the CSV file format, this method should 
be as follows:

   private String csvSafe(String str)
   {
      if (str.contains("\"")
            || str.contains(",")
            || str.contains("\r")
            || str.contains("\n"))
         str = "\"" + str.replaceAll("\"", "\"\"") + "\"";
      return str;
   }

This allows for fields that contain carriage returns and newlines, and it also 
quotes columns that contain quotes, which is expected by some parsers.

Thanks,

Ian Emmons
BBN Technologies