Fixed a few typos.

Text and code used slightly different number from earlier edits.

clean_book

@@ -0,0 +1,17 @@
+#! /bin/bash
+rm --f *.tex
+rm --f *.toc
+rm --f *.aux
+rm --f *.log
+rm --f *.out
+rm --f ./*_files/*.png
+rm --f Kalman_and_Bayesian_Filters_in_Python.ipynb
+rm --f Kalman_and_Bayesian_Filters_in_Python.toc
+rm --f Kalman_and_Bayesian_Filters_in_Python.tex
+rmdir  ./*_files/ 2> /dev/null
+
+if (( $# == 1)); then
+  if [ "@1" == all ]; then
+    rm Kalman_and_Bayesian_Filters_in_Python.pdf;
+  fi 
+fi