Merge pull request #3843 from akshayka/gpu_fix

Fix eager demo's GPU cell

samples/outreach/demos/eager_execution.ipynb

@@ -282,9 +282,10 @@
       },
       "cell_type": "code",
       "source": [
-        "if tf.test.is_gpu_available() > 0:\n",
+        "if tf.test.is_gpu_available():\n",
         "  with tf.device(tf.test.gpu_device_name()):\n",
-        "    print(tf.matmul(A, A))"
+        "    B = tf.constant([[2.0, 0.0], [0.0, 3.0]])\n",
+        "    print(tf.matmul(B, B))"
       ],
       "execution_count": 0,
       "outputs": []