diff --git a/notebooks/STIS/low_count_uncertainties/Low_Count_Uncertainties.ipynb b/notebooks/STIS/low_count_uncertainties/Low_Count_Uncertainties.ipynb
index af7de3aa8..6b2e2473c 100644
--- a/notebooks/STIS/low_count_uncertainties/Low_Count_Uncertainties.ipynb
+++ b/notebooks/STIS/low_count_uncertainties/Low_Count_Uncertainties.ipynb
@@ -853,18 +853,22 @@
     "def quadrature(scenario):\n",
     "      return np.sqrt(np.sum([np.sqrt(i)**2 for i in scenario]))\n",
     "\n",
+    "\n",
     "def sum_sq(scenario):\n",
     "      return np.sqrt(np.sum(scenario))\n",
     "\n",
+    "\n",
     "def pixel_err(scenario):\n",
     "      return np.sqrt(np.sum(\n",
     "            [(poisson_conf_interval(i, interval='frequentist-confidence')[1]-i)**2 \n",
     "             for i in scenario]))\n",
     "\n",
+    "\n",
     "def upper_err(scenario):\n",
     "      return (poisson_conf_interval(\n",
     "            np.sum(scenario), interval='frequentist-confidence')[1]\n",
-    "              - np.sum(scenario))\n",
+    "            - np.sum(scenario))\n",
+    "\n",
     "\n",
     "print('Scenario 1: ', scenario1)\n",
     "print('Scenario 2: ', scenario2)\n",