changes per code review

Author: mitzimorris

docsrc/examples/VI as Sampler Inits.ipynb

@@ -78,7 +78,7 @@
     "### Run Stan's variational inference algorithm, obtain fitted estimates\n",
     "\n",
     "The `CmdStanModel` method `variational` runs CmdStan's ADVI algorithm.\n",
-    "Conditioning the model on the data results in a posterior geometry which is difficult to navigate.  Because the ADVI algorithm may fail to converge, we run it with argument `require_converged` set to `False`."
+    "Conditioning the model on the data results in a posterior geometry which is difficult to navigate.  Because the ADVI algorithm is unstable and may fail to converge, we run it with argument `require_converged` set to `False`.  We also specify a seed, to avoid instabilities as well as for reproducibility."
    ]
   },
   {
@@ -156,7 +156,7 @@
     "- beta[2]:  0.059\n",
     "- sigma: 0.894\n",
     "\n",
-    "To see how this is useful, we run the sampler with default initializations, step size, and warmup, (same random seed)."
+    "To see how this is useful, we run the sampler with default initializations, step size, and warmup."
    ]
   },
   {