Javadoc.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/csv/trunk@1466223 13f79535-47bb-0310-9956-ffa450edef68

Author: garydgregory

src/main/java/org/apache/commons/csv/CSVFormat.java

@@ -588,7 +588,8 @@ public static CSVFormatBuilder newBuilder(final CSVFormat format) {
      *            <tt>true</tt> when the parser should skip empty lines
      * @param recordSeparator
      *            the line separator to use for output
-     * @param nullToString TODO
+     * @param nullToString 
+     *            the String to use to write <code>null</code> values.
      * @param header
      *            the header
      * @throws IllegalArgumentException if the delimiter is a line break character