message: fixed type error (API r1.3 document, tf.truncatediv)
  It was just type error
  from '-7 / 5 = 1'  to '-7 / 5 = -1'
diff: @@ -623,7 +623,7 @@ REGISTER_OP("TruncateDiv")
  Returns x / y element-wise for integer types.
  Truncation designates that negative numbers will round fractional quantities
  -toward zero. I.e. -7 / 5 = 1. This matches C semantics but it is different
  +toward zero. I.e. -7 / 5 = -1. This matches C semantics but it is different
  than Python semantics. See `FloorDiv` for a division function that matches
  Python Semantics.
  