Merge pull request #93 from mtotschnig/master

Another typo

Author: csev

Diff for: book/notes/n_085_01.md

@@ -1,6 +1,6 @@
 Ah recursion.  Recursion is a beloved concept in Computer Science.  It is often taught early in most programming 
-courses because it is "so cool".   Most examples like computing factorial or the example above of converting a
-an integer to a string are not good uses of recursion.
+courses because it is "so cool".   Most examples like computing factorial or the example above of converting an
+integer to a string are not good uses of recursion.
 
 But when you need to traverse a tree-based structure like an XML document, or parse a mathematical expression,
 recursion is the ideal solution.  So the problem is not recursion, but when it is taught and what examples are used.