Apply typo fixes from Julio M. Merino Vidal

[SVN r27513]

generic_programming.html

@@ -75,7 +75,7 @@ void* memcpy(void* region1, const void* region2, size_t n)
     not in an array? Perhaps it is in a linked list. Can we generalize the
     notion of copy to any sequence of elements? Looking at the body of
     <tt>memcpy()</tt>, the function's <b><i>minimal requirements</i></b> are
-    that it needs to to <i>traverse</i> through the sequence using some sort
+    that it needs to <i>traverse</i> through the sequence using some sort
     of pointer, <i>access</i> elements pointed to, <i>write</i> the elements
     to the destination, and <i>compare</i> pointers to know when to stop. The
     C++ standard library groups requirements such as these into