Merge in all documentation changes since branching 3.4.0rc1.

Doc/c-api/arg.rst

@@ -45,6 +45,7 @@ in any early abort case).
 Unless otherwise stated, buffers are not NUL-terminated.
 
 .. note::
+
    For all ``#`` variants of formats (``s#``, ``y#``, etc.), the type of
    the length argument (int or :c:type:`Py_ssize_t`) is controlled by
    defining the macro :c:macro:`PY_SSIZE_T_CLEAN` before including

Doc/c-api/exceptions.rst

@@ -525,11 +525,11 @@ Exception Objects
    reference, as accessible from Python through :attr:`__cause__`.
 
 
-.. c:function:: void PyException_SetCause(PyObject *ex, PyObject *ctx)
+.. c:function:: void PyException_SetCause(PyObject *ex, PyObject *cause)
 
-   Set the cause associated with the exception to *ctx*.  Use *NULL* to clear
-   it.  There is no type check to make sure that *ctx* is either an exception
-   instance or :const:`None`.  This steals a reference to *ctx*.
+   Set the cause associated with the exception to *cause*.  Use *NULL* to clear
+   it.  There is no type check to make sure that *cause* is either an exception
+   instance or :const:`None`.  This steals a reference to *cause*.
 
    :attr:`__suppress_context__` is implicitly set to ``True`` by this function.
 

Doc/c-api/init.rst

@@ -582,6 +582,7 @@ code, or when embedding the Python interpreter:
    .. index:: module: _thread
 
    .. note::
+
       When only the main thread exists, no GIL operations are needed. This is a
       common situation (most Python programs do not use threads), and the lock
       operations slow the interpreter down a bit. Therefore, the lock is not

Doc/c-api/module.rst

@@ -120,7 +120,7 @@ There are only a few functions special to module objects.
 
    Return a pointer to the :c:type:`PyModuleDef` struct from which the module was
    created, or *NULL* if the module wasn't created with
-   :c:func:`PyModule_Create`.i
+   :c:func:`PyModule_Create`.
 
 .. c:function:: PyObject* PyState_FindModule(PyModuleDef *def)
 

Doc/c-api/object.rst

@@ -357,9 +357,9 @@ attribute is considered sufficient for this determination.
 
 .. c:function:: Py_ssize_t PyObject_LengthHint(PyObject *o, Py_ssize_t default)
 
-   Return an estimated length for the object *o*. First trying to return its
-   actual length, then an estimate using ``__length_hint__``, and finally
-   returning the default value. On error ``-1`` is returned. This is the
+   Return an estimated length for the object *o*. First try to return its
+   actual length, then an estimate using :meth:`~object.__length_hint__`, and
+   finally return the default value. On error return ``-1``. This is the
    equivalent to the Python expression ``operator.length_hint(o, default)``.
 
    .. versionadded:: 3.4

Doc/c-api/tuple.rst

@@ -129,6 +129,14 @@ type.
    Initializes a struct sequence type *type* from *desc* in place.
 
 
+.. c:function:: int PyStructSequence_InitType2(PyTypeObject *type, PyStructSequence_Desc *desc)
+
+   The same as ``PyStructSequence_InitType``, but returns ``0`` on success and ``-1`` on
+   failure.
+
+   .. versionadded:: 3.4
+
+
 .. c:type:: PyStructSequence_Desc
 
    Contains the meta information of a struct sequence type to create.

Doc/c-api/typeobj.rst

@@ -205,9 +205,8 @@ type objects) *must* have the :attr:`ob_size` field.
    bit currently defined is :const:`Py_PRINT_RAW`. When the :const:`Py_PRINT_RAW`
    flag bit is set, the instance should be printed the same way as :c:member:`~PyTypeObject.tp_str`
    would format it; when the :const:`Py_PRINT_RAW` flag bit is clear, the instance
-   should be printed the same was as :c:member:`~PyTypeObject.tp_repr` would format it. It should
-   return ``-1`` and set an exception condition when an error occurred during the
-   comparison.
+   should be printed the same way as :c:member:`~PyTypeObject.tp_repr` would format it. It should
+   return ``-1`` and set an exception condition when an error occurs.
 
    It is possible that the :c:member:`~PyTypeObject.tp_print` field will be deprecated. In any case,
    it is recommended not to define :c:member:`~PyTypeObject.tp_print`, but instead to rely on