Issue #17215: Fix documentation misprints (patch by July Tikhonov)

Doc/library/importlib.rst

@@ -328,7 +328,7 @@ ABC hierarchy::
 .. class:: FileLoader(fullname, path)
 
    An abstract base class which inherits from :class:`ResourceLoader` and
-   :class:`ExecutionLoader`, providing concreate implementations of
+   :class:`ExecutionLoader`, providing concrete implementations of
    :meth:`ResourceLoader.get_data` and :meth:`ExecutionLoader.get_filename`.
 
    The *fullname* argument is a fully resolved name of the module the loader is

Doc/library/io.rst

@@ -110,7 +110,7 @@ High-level Module Interface
    :func:`os.stat`) if possible.
 
 
-.. function:: open(file, mode='r', buffering=-1, encoding=None, errors=None, newline=None, closefd=True)
+.. function:: open(file, mode='r', buffering=-1, encoding=None, errors=None, newline=None, closefd=True, opener=None)
 
    This is an alias for the builtin :func:`open` function.