message: added usage example for tf.math.argmax() in api_def_ArgMax.pbtxt
diff: @@ -11,5 +11,18 @@ END
  summary: "Returns the index with the largest value across dimensions of a tensor."
  description: <<END
  Note that in case of ties the identity of the return value is not guaranteed.
  +
  +For example:
  +
  +```
  +import tensorflow as tf
  +
  +a = [1, 10, 26.9, 2.8, 166.32, 62.3]
  +
  +b = tf.math.argmax(input = a)
  +
  +c = tf.keras.backend.eval(b) # c = 4
  +
  +# here a[4] = 166.32 which is the largest element of a
  END
  }
  