Merge pull request #1165 from chimeno/patch-1

Update free-programming-books.md

free-programming-books.md

@@ -1499,7 +1499,7 @@ See also [TeX](#tex)
 * [Welcome to Problem Solving with Algorithms and Data Structures](http://interactivepython.org/runestone/static/pythonds/index.html) - Brad Miller and David Ranum
 * [Wikibooks: Python Programming](http://en.wikibooks.org/wiki/Python_Programming) (2.7)
 * [CodeCademy Python](http://www.codecademy.com/tracks/python)
-* [Pyhthon for Informatics](http://www.pythonlearn.com/book_007.pdf)
+* [Python for Informatics](http://www.pythonlearn.com/book_007.pdf)
 
 
 #### Django