Improve test coverage in CSVFormatTest apache#65.

Author: garydgregory

src/changes/changes.xml

@@ -49,6 +49,7 @@
       <action                 type="update" dev="ggregory" due-to="Gary Gregory">Update org.junit.jupiter:junit-jupiter from 5.6.0 to 5.6.1.</action>
       <action                 type="update" dev="ggregory" due-to="Chen">Fix CSVFileParserTest.java to allow for a null return value from record.getComment() #62.</action>      
       <action                 type="update" dev="ggregory" due-to="Gary Gregory">Update tests from Apache Commons Lang 3.9 to 3.10.</action>
+      <action                 type="update" dev="ggregory" due-to="Chen">Improve test coverage in CSVFormatTest #65.</action>      
     </release>
     <release version="1.8" date="2020-02-01" description="Feature and bug fix release (Java 8).