Fixes per @wbinventor comments

docs/source/pythonapi/examples/mgxs-part-i.ipynb

@@ -520,8 +520,8 @@
       "         Copyright | 2011-2017 Massachusetts Institute of Technology\n",
       "           License | http://openmc.readthedocs.io/en/latest/license.html\n",
       "           Version | 0.8.0\n",
-      "          Git SHA1 | 2bf05f281e566a81e181ee0e9c699138b37b57b4\n",
-      "         Date/Time | 2017-01-19 13:31:59\n",
+      "          Git SHA1 | 6e3f6bf8b11cb3f6f171f1c351ddcaf85dd515ec\n",
+      "         Date/Time | 2017-02-11 14:02:54\n",
       "    OpenMP Threads | 8\n",
       "\n",
       " ===========================================================================\n",
@@ -607,20 +607,20 @@
       "\n",
       " =======================>     TIMING STATISTICS     <=======================\n",
       "\n",
-      " Total time for initialization     =  3.1727E-01 seconds\n",
-      "   Reading cross sections          =  2.4380E-01 seconds\n",
-      " Total time in simulation          =  2.3160E+00 seconds\n",
-      "   Time in transport only          =  2.2082E+00 seconds\n",
-      "   Time in inactive batches        =  2.4914E-01 seconds\n",
-      "   Time in active batches          =  2.0669E+00 seconds\n",
-      "   Time synchronizing fission bank =  2.7438E-03 seconds\n",
-      "     Sampling source sites         =  2.0106E-03 seconds\n",
-      "     SEND/RECV source sites        =  6.9831E-04 seconds\n",
-      "   Time accumulating tallies       =  4.9308E-05 seconds\n",
-      " Total time for finalization       =  4.0687E-04 seconds\n",
-      " Total time elapsed                =  2.6419E+00 seconds\n",
-      " Calculation Rate (inactive)       =  1.00345E+05 neutrons/second\n",
-      " Calculation Rate (active)         =  48381.7 neutrons/second\n",
+      " Total time for initialization     =  3.8572E-01 seconds\n",
+      "   Reading cross sections          =  2.6254E-01 seconds\n",
+      " Total time in simulation          =  4.0095E+00 seconds\n",
+      "   Time in transport only          =  3.1037E+00 seconds\n",
+      "   Time in inactive batches        =  7.2398E-01 seconds\n",
+      "   Time in active batches          =  3.2855E+00 seconds\n",
+      "   Time synchronizing fission bank =  2.9057E-03 seconds\n",
+      "     Sampling source sites         =  2.1033E-03 seconds\n",
+      "     SEND/RECV source sites        =  7.5640E-04 seconds\n",
+      "   Time accumulating tallies       =  7.2906E-05 seconds\n",
+      " Total time for finalization       =  7.4175E-04 seconds\n",
+      " Total time elapsed                =  4.4039E+00 seconds\n",
+      " Calculation Rate (inactive)       =  34531.2 neutrons/second\n",
+      " Calculation Rate (active)         =  30436.6 neutrons/second\n",
       "\n",
       " ============================>     RESULTS     <============================\n",
       "\n",
@@ -739,8 +739,8 @@
       "\tDomain Type    =\tcell\n",
       "\tDomain ID      =\t1\n",
       "\tCross Sections [cm^-1]:\n",
-      "            Group 1 [0.625      - 20000000.0eV]:\t2.69e-01 +/- 2.69e-01%\n",
-      "            Group 2 [0.0        - 0.625     eV]:\t5.93e-01 +/- 5.93e-01%\n",
+      "            Group 1 [0.625      - 20000000.0eV]:\t6.81e-01 +/- 2.69e-01\n",
+      "            Group 2 [0.0        - 0.625     eV]:\t1.40e+00 +/- 5.93e-01\n",
       "\n",
       "\n",
       "\n"
@@ -901,7 +901,7 @@
        "      <td>6.250000e-01</td>\n",
        "      <td>total</td>\n",
        "      <td>(((total / flux) - (absorption / flux)) - (sca...</td>\n",
-       "      <td>-2.442491e-15</td>\n",
+       "      <td>-2.664535e-15</td>\n",
        "      <td>0.011292</td>\n",
        "    </tr>\n",
        "    <tr>\n",
@@ -911,7 +911,7 @@
        "      <td>2.000000e+07</td>\n",
        "      <td>total</td>\n",
        "      <td>(((total / flux) - (absorption / flux)) - (sca...</td>\n",
-       "      <td>-5.551115e-16</td>\n",
+       "      <td>-8.881784e-16</td>\n",
        "      <td>0.002570</td>\n",
        "    </tr>\n",
        "  </tbody>\n",
@@ -924,8 +924,8 @@
        "1     1         6.25e-01          2.00e+07   total   \n",
        "\n",
        "                                               score      mean  std. dev.  \n",
-       "0  (((total / flux) - (absorption / flux)) - (sca... -2.44e-15   1.13e-02  \n",
-       "1  (((total / flux) - (absorption / flux)) - (sca... -5.55e-16   2.57e-03  "
+       "0  (((total / flux) - (absorption / flux)) - (sca... -2.66e-15   1.13e-02  \n",
+       "1  (((total / flux) - (absorption / flux)) - (sca... -8.88e-16   2.57e-03  "
       ]
      },
      "execution_count": 22,