Test readLine for correct interpretation of maxLineLength
   * (returned string should be clipped at maxLineLength, and the
   * remaining bytes on the same line should be thrown out).
   * Also check that returned value matches the string length.
   * Varies buffer size to stress test.
Test readLine for correct interpretation of maxLineLength
   * (returned string should be clipped at maxLineLength, and the
   * remaining bytes on the same line should be thrown out).
   * Also check that returned value matches the string length.
   * Varies buffer size to stress test. | TestTextInputFormat.java