diff --git a/Doc/library/collections.rst b/Doc/library/collections.rst
index 1f563ee..b74c24d 100644
--- a/Doc/library/collections.rst
+++ b/Doc/library/collections.rst
@@ -576,7 +576,7 @@
 three additional methods and one attribute.  To prevent conflicts with
 field names, the method and attribute names start with an underscore.
 
-.. method:: somenamedtuple._make(iterable)
+.. classmethod:: somenamedtuple._make(iterable)
 
    Class method that makes a new instance from an existing sequence or iterable.
 
diff --git a/Doc/library/csv.rst b/Doc/library/csv.rst
index 407efd0..c399bb7 100644
--- a/Doc/library/csv.rst
+++ b/Doc/library/csv.rst
@@ -78,7 +78,7 @@
    A short usage example::
 
       >>> import csv
-      >>> spamReader = csv.reader(open('eggs.csv'), delimiter=' ', quotechar='|')
+      >>> spamReader = csv.reader(open('eggs.csv', 'rb'), delimiter=' ', quotechar='|')
       >>> for row in spamReader:
       ...     print ', '.join(row)
       Spam, Spam, Spam, Spam, Spam, Baked Beans
@@ -116,7 +116,7 @@
    A short usage example::
 
       >>> import csv
-      >>> spamWriter = csv.writer(open('eggs.csv', 'w'), delimiter=' ',
+      >>> spamWriter = csv.writer(open('eggs.csv', 'wb'), delimiter=' ',
       ...                         quotechar='|', quoting=csv.QUOTE_MINIMAL)
       >>> spamWriter.writerow(['Spam'] * 5 + ['Baked Beans'])
       >>> spamWriter.writerow(['Spam', 'Lovely Spam', 'Wonderful Spam'])
@@ -234,7 +234,7 @@
 
 An example for :class:`Sniffer` use::
 
-   csvfile = open("example.csv")
+   csvfile = open("example.csv", "rb")
    dialect = csv.Sniffer().sniff(csvfile.read(1024))
    csvfile.seek(0)
    reader = csv.reader(csvfile, dialect)
diff --git a/Doc/library/dis.rst b/Doc/library/dis.rst
index 38797ff..e3f30cb 100644
--- a/Doc/library/dis.rst
+++ b/Doc/library/dis.rst
@@ -6,11 +6,17 @@
    :synopsis: Disassembler for Python bytecode.
 
 
-The :mod:`dis` module supports the analysis of Python :term:`bytecode` by disassembling
-it.  Since there is no Python assembler, this module defines the Python assembly
-language.  The Python bytecode which this module takes as an input is defined
-in the file  :file:`Include/opcode.h` and used by the compiler and the
-interpreter.
+The :mod:`dis` module supports the analysis of CPython :term:`bytecode` by
+disassembling it. The CPython bytecode which this module takes as an
+input is defined in the file :file:`Include/opcode.h` and used by the compiler
+and the interpreter.
+
+.. impl-detail::
+
+   Bytecode is an implementation detail of the CPython interpreter!  No
+   guarantees are made that bytecode will not be added, removed, or changed
+   between versions of Python.  Use of this module should not be considered to
+   work across Python VMs or Python releases.
 
 Example: Given the function :func:`myfunc`::
 
diff --git a/Doc/library/os.rst b/Doc/library/os.rst
index 92b443e..5b3a922 100644
--- a/Doc/library/os.rst
+++ b/Doc/library/os.rst
@@ -705,7 +705,7 @@
 
       This function is intended for low-level I/O.  For normal usage, use the
       built-in function :func:`open`, which returns a "file object" with
-      :meth:`~file.read` and :meth:`~file.wprite` methods (and many more).  To
+      :meth:`~file.read` and :meth:`~file.write` methods (and many more).  To
       wrap a file descriptor in a "file object", use :func:`fdopen`.
 
 
@@ -2035,8 +2035,9 @@
 
    The :mod:`subprocess` module provides more powerful facilities for spawning new
    processes and retrieving their results; using that module is preferable to using
-   this function.  Use the :mod:`subprocess` module.  Check especially the
-   :ref:`subprocess-replacements` section.
+   this function.  See the
+   :ref:`subprocess-replacements` section in the :mod:`subprocess` documentation
+   for some helpful recipes.
 
    Availability: Unix, Windows.
 
diff --git a/Doc/library/stdtypes.rst b/Doc/library/stdtypes.rst
index 39bef7c..188d3eb 100644
--- a/Doc/library/stdtypes.rst
+++ b/Doc/library/stdtypes.rst
@@ -799,7 +799,8 @@
 
 .. method:: str.capitalize()
 
-   Return a copy of the string with only its first character capitalized.
+   Return a copy of the string with its first character capitalized and the
+   rest lowercased.
 
    For 8-bit strings, this method is locale-dependent.
 
diff --git a/Doc/library/test.rst b/Doc/library/test.rst
index f447ea4..c73e23e 100644
--- a/Doc/library/test.rst
+++ b/Doc/library/test.rst
@@ -6,6 +6,13 @@
    :synopsis: Regression tests package containing the testing suite for Python.
 .. sectionauthor:: Brett Cannon <brett@python.org>
 
+.. note::
+    The :mod:`test` package is meant for internal use by Python only. It is
+    documented for the benefit of the core developers of Python. Any use of
+    this package outside of Python's standard library is discouraged as code
+    mentioned here can change or be removed without notice between releases of
+    Python.
+
 
 The :mod:`test` package contains all regression tests for Python as well as the
 modules :mod:`test.test_support` and :mod:`test.regrtest`.
diff --git a/Doc/library/threading.rst b/Doc/library/threading.rst
index 01f19a3..6a8ed0d 100644
--- a/Doc/library/threading.rst
+++ b/Doc/library/threading.rst
@@ -319,8 +319,8 @@
 
       Return whether the thread is alive.
 
-      Roughly, a thread is alive from the moment the :meth:`start` method
-      returns until its :meth:`run` method terminates. The module function
+      This method returns ``True`` just before the :meth:`run` method starts
+      until just after the :meth:`run` method terminates.  The module function
       :func:`.enumerate` returns a list of all alive threads.
 
    .. method:: isDaemon()
diff --git a/Misc/NEWS b/Misc/NEWS
index e4a73c9..0265644 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -437,6 +437,9 @@
 Documentation
 -------------
 
+- Issue #9255: Document that the 'test' package is for internal Python use
+  only.
+
 - Issue #8909: Added the size of the bitmap used in the installer created by
   distutils' bdist_wininst. Patch by Anatoly Techtonik.