Merged changes for #2981, #4166, and #4377 to release branch

[SVN r63523]

doc/v2/args.html

@@ -101,7 +101,7 @@ namespace boost { namespace python
         struct arg 
         {
           template <class T>
-                  arg &perator = (T const &value);
+                  arg &operator = (T const &value);
           explicit arg (char const *name){elements[0].name = name;}
         };
 

doc/v2/return_internal_reference.html

@@ -167,12 +167,13 @@ PyObject* postcall(PyObject* args, PyObject* result);
 
 class Bar
 {
+ public:
    Bar(int x) : x(x) {}
    int get_x() const { return x; }
    void set_x(int x) { this->x = x; }
  private:
    int x;
-}
+};
 
 class Foo
 {
@@ -189,7 +190,7 @@ class Foo
 using namespace boost::python;
 BOOST_PYTHON_MODULE(internal_refs)
 {
-   class_<Bar>("Bar")
+   class_<Bar>("Bar", init<int>())
       .def("get_x", &Bar::get_x)
       .def("set_x", &Bar::set_x)
       ;