Merge remote-tracking branch 'upstream/main' into pop_top_calls

Author: Fidget-Spinner

Doc/c-api/unicode.rst

@@ -1881,6 +1881,10 @@ object.
    On success, return ``0``.
    On error, set an exception, leave the writer unchanged, and return ``-1``.
 
+   To write a :class:`str` subclass which overrides the :meth:`~object.__str__`
+   method, :c:func:`PyUnicode_FromObject` can be used to get the original
+   string.
+
 .. c:function:: int PyUnicodeWriter_WriteRepr(PyUnicodeWriter *writer, PyObject *obj)
 
    Call :c:func:`PyObject_Repr` on *obj* and write the output into *writer*.

Doc/library/asyncio-future.rst

@@ -196,6 +196,10 @@ Future Object
       Otherwise, change the Future's state to *cancelled*,
       schedule the callbacks, and return ``True``.
 
+      The optional string argument *msg* is passed as the argument to the
+      :exc:`CancelledError` exception raised when a cancelled Future
+      is awaited.
+
       .. versionchanged:: 3.9
          Added the *msg* parameter.
 

Doc/library/stdtypes.rst

@@ -2775,8 +2775,22 @@ expression support in the :mod:`re` module).
 .. method:: str.swapcase()
 
    Return a copy of the string with uppercase characters converted to lowercase and
-   vice versa. Note that it is not necessarily true that
-   ``s.swapcase().swapcase() == s``.
+   vice versa. For example:
+
+   .. doctest::
+
+      >>> 'Hello World'.swapcase()
+      'hELLO wORLD'
+
+   Note that it is not necessarily true that ``s.swapcase().swapcase() == s``.
+   For example:
+
+   .. doctest::
+
+      >>> 'straße'.swapcase().swapcase()
+      'strasse'
+
+   See also :meth:`str.lower` and :meth:`str.upper`.
 
 
 .. method:: str.title()