revert tostring implementation

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/csv/trunk@1624273 13f79535-47bb-0310-9956-ffa450edef68

Author: Brent Worden

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

@@ -236,12 +236,9 @@ public Map<String, String> toMap() {
      */
     @Override
     public String toString() {
-        StringBuilder sb = new StringBuilder();
-        sb.append("CSVRecord [comment=").append(comment);
-        sb.append(", mapping=").append(mapping);
-        sb.append(", recordNumber=").append(recordNumber);
-        sb.append(", values=").append(Arrays.toString(values)).append(']');
-        return sb.toString();
+        return "CSVRecord [comment=" + comment + ", mapping=" + mapping +
+                ", recordNumber=" + recordNumber + ", values=" +
+                Arrays.toString(values) + "]";
     }
 
     String[] values() {