message: RFC doc -- minor fix to formatting of Table 1
diff: @@ -54,6 +54,7 @@ The Avro dataset shall support
  | bytes: a sequence of 8-bit unsigned bytes | tf.string |
  | string: unicode character sequence | tf.string |
  | enum: enumeration | tf.string |
  +
  **Table 1** lists the mapping of Avro primitive types to TensorFlow primitive types.
  The Avro dataset shall NOT support
  