Apply patches to correct typos from Michel Morin.

Refs #7683.

[SVN r82241]

examples/copy_example.cpp

@@ -32,7 +32,7 @@ namespace opt{
 //
 // opt::copy
 // same semantics as std::copy
-// calls memcpy where appropiate.
+// calls memcpy where appropriate.
 //
 
 namespace detail{

examples/iter_swap_example.cpp

@@ -33,7 +33,7 @@ namespace opt{
 
 //
 // iter_swap:
-// tests whether iterator is a proxying iterator or not, and
+// tests whether iterator is a proxy iterator or not, and
 // uses optimal form accordingly:
 //
 namespace detail{