Small fixes for Animation and Progress notebook

docs/examples/notebooks/Animations_and_Progress.ipynb

@@ -115,7 +115,7
      "collapsed": false,
      "input": [
       "from scipy.special import jn",
-      "x = linspace(0,5)",
+      "x = np.linspace(0,5)",
       "f, ax = plt.subplots()",
       "ax.set_title(\"Bessel functions\")",
       "",
@@ -244,7 +244,7
       "        all_full = self.width - 2",
       "        num_hashes = int(round((percent_done / 100.0) * all_full))",
       "        self.prog_bar = '[' + self.fill_char * num_hashes + ' ' * (all_full - num_hashes) + ']'",
-      "        pct_place = (len(self.prog_bar) / 2) - len(str(percent_done))",
+      "        pct_place = (len(self.prog_bar) // 2) - len(str(percent_done))",
       "        pct_string = '%d%%' % percent_done",
       "        self.prog_bar = self.prog_bar[0:pct_place] + \\",
       "            (pct_string + self.prog_bar[pct_place + len(pct_string):])",