Fix typos in docs

examples/exact_types_match.cpp

@@ -11,7 +11,7 @@
 
     In this example we'll create a class, that stores pointer to function and remembers the exact type of a 
     parameter that function accepts. When an attempt to call the stored function will be made, type of input 
-    parameter will be checked for exact match with initaily erased type of function.
+    parameter will be checked for exact match with initially erased type of function.
 */
 
 #include <boost/type_index.hpp>

examples/user_defined_typeinfo.cpp

@@ -45,7 +45,7 @@ int main() {
 
 //[type_index_my_type_index_type_id_runtime_test
 /*`
-    Now the follwoing example will compile and work.
+    Now the following example will compile and work.
 */
     my_struct str;
     my_class& reference = str;