diff --git a/.gitignore b/.gitignore
index d456c71..0c498ba 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,16 +1,16 @@
-*.bak
-.ipynb_checkpoints
-__pycache__
-*.pyc
-short.pdf
-*.aux
-*.out
-book.ipynb
-*.tex
-*.toc
-book.pdf
-book6x9.pdf
-Kalman_and_Bayesian_Filters_in_Python6x9.pdf
-Kalman_and_Bayesian_Filters_in_Python.pdf
-book_files
+*.bak
+.ipynb_checkpoints
+__pycache__
+*.pyc
+short.pdf
+*.aux
+*.out
+book.ipynb
+*.tex
+*.toc
+book.pdf
+book6x9.pdf
+Kalman_and_Bayesian_Filters_in_Python6x9.pdf
+Kalman_and_Bayesian_Filters_in_Python.pdf
+book_files
 tmp
\ No newline at end of file