message: Typo activation->attention
diff: " self.attention = BahdanauAttention(self.units)\n",
  " \n",
  " def call(self, x, features, hidden):\n",
  - " # defining activation as a separate model\n",
  + " # defining attention as a separate model\n",
  " context_vector, attention_weights = self.attention(features, hidden)\n",
  " \n",
  " # x shape after passing through embedding == (batch_size, 1, embedding_dim)\n",
  