Better assertion failure message

Author: garydgregory

src/test/java/org/apache/commons/csv/JiraCsv196Test.java

@@ -49,7 +49,7 @@ public void testParseFourBytes() throws IOException {
             final long[] charByteKey = { 0, 84, 701, 1318, 1935 };
             int idx = 0;
             for (final CSVRecord record : parser) {
-                assertEquals(charByteKey[idx++], record.getBytePosition(), "index " + idx);
+                assertEquals(charByteKey[idx++], record.getBytePosition(), "At index " + idx);
             }
         }
     }
@@ -69,7 +69,7 @@ public void testParseThreeBytes() throws IOException {
             final long[] charByteKey = { 0, 89, 242, 395 };
             int idx = 0;
             for (final CSVRecord record : parser) {
-                assertEquals(charByteKey[idx++], record.getBytePosition(), "index " + idx);
+                assertEquals(charByteKey[idx++], record.getBytePosition(), "At index " + idx);
             }
         }
     }