Fix Mathematical Thinking extras table

ericdouglas · ericdouglas · commit 0d0f5db39f67 · 2016-04-18T06:37:10.000-03:00
diff --git a/extras/courses.md b/extras/courses.md
@@ -51,6 +51,8 @@ Courses | Duration | Effort
 [Introduction to Logic](https://www.coursera.org/course/intrologic)| 8 weeks | 4-10 hours/week
 
 ### Math (Mathematical Thinking)
+
+Courses | Duration | Effort
 :-- | :--: | :--:
 [Introduction to Mathematical Thinking](https://www.coursera.org/course/maththink)| 10 weeks | 8-10 hours/week
 
