diff --git a/Doc/library/locale.rst b/Doc/library/locale.rst
index 601c949..9581186 100644
--- a/Doc/library/locale.rst
+++ b/Doc/library/locale.rst
@@ -529,7 +529,7 @@
 
 Python applications should normally find no need to invoke these functions, and
 should use :mod:`gettext` instead.  A known exception to this rule are
-applications that link use additional C libraries which internally invoke
+applications that link with additional C libraries which internally invoke
 :cfunc:`gettext` or :func:`dcgettext`.  For these applications, it may be
 necessary to bind the text domain, so that the libraries can properly locate
 their message catalogs.
diff --git a/Doc/library/multiprocessing.rst b/Doc/library/multiprocessing.rst
index c4ee87e..f726a02 100644
--- a/Doc/library/multiprocessing.rst
+++ b/Doc/library/multiprocessing.rst
@@ -792,9 +792,9 @@
     >>> a.send([1, 'hello', None])
     >>> b.recv()
     [1, 'hello', None]
-    >>> b.send_bytes('thank you')
+    >>> b.send_bytes(b'thank you')
     >>> a.recv_bytes()
-    'thank you'
+    b'thank you'
     >>> import array
     >>> arr1 = array.array('i', range(5))
     >>> arr2 = array.array('i', [0] * 10)
diff --git a/Doc/library/re.rst b/Doc/library/re.rst
index 448bcb7..49c241d 100644
--- a/Doc/library/re.rst
+++ b/Doc/library/re.rst
@@ -229,7 +229,7 @@
    undefined.
 
 ``(?:...)``
-   A non-grouping version of regular parentheses. Matches whatever regular
+   A non-capturing version of regular parentheses.  Matches whatever regular
    expression is inside the parentheses, but the substring matched by the group
    *cannot* be retrieved after performing a match or referenced later in the
    pattern.
diff --git a/Doc/library/string.rst b/Doc/library/string.rst
index 409f461..a5d11de 100644
--- a/Doc/library/string.rst
+++ b/Doc/library/string.rst
@@ -114,7 +114,7 @@
 
       Loop over the format_string and return an iterable of tuples
       (*literal_text*, *field_name*, *format_spec*, *conversion*).  This is used
-      by :meth:`vformat` to break the string in to either literal text, or
+      by :meth:`vformat` to break the string into either literal text, or
       replacement fields.
 
       The values in the tuple conceptually represent a span of literal text
diff --git a/Doc/library/warnings.rst b/Doc/library/warnings.rst
index 36d47ad..e62be55 100644
--- a/Doc/library/warnings.rst
+++ b/Doc/library/warnings.rst
@@ -159,6 +159,20 @@
    warnings.simplefilter('default', ImportWarning)
 
 
+Default Warning Filters
+~~~~~~~~~~~~~~~~~~~~~~~
+
+By default, Python installs several warning filters, which can be overridden by
+the command-line options passed to :option:`-W` and calls to
+:func:`filterwarnings`.
+
+* :exc:`PendingDeprecationWarning`, and :exc:`ImportWarning` are ignored.
+
+* :exc:`BytesWarning` is ignored unless the :option:`-b` option is given once or
+  twice; in this case this warning is either printed (``-b``) or turned into an
+  exception (``-bb``).
+
+
 .. _warning-suppress:
 
 Temporarily Suppressing Warnings