diff --git a/.gitignore b/.gitignore
index fbb0ed8e7661763338eef01b159993a0eb97c3ae..a10ddbf92c1528c4b7b7ef69359928dfd1f46503 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,5 @@
 *.py
 *.swp
 *.swo
+*.png
+*.eps
diff --git a/README.md b/README.md
index 8096c2ae69736759acec46d879366750a377d385..fa4e4caf84c4a078b5aa8ad0e0464558bcfef03c 100644
--- a/README.md
+++ b/README.md
@@ -128,7 +128,7 @@ the cropped parabola f(x), which is limited y=4 for x>=2.
     f(x) = \left\{\begin{array}{lr}
               x^2, & \text{for } x < 2\\
               4, & \text{for } 2 \leq x
-            \end{array}\right\.
+            \end{array}\right.
 ```
 
 The final plot should look like this.