diff --git a/Doc/library/heapq.rst b/Doc/library/heapq.rst
index 5cf8163..2190b80 100644
--- a/Doc/library/heapq.rst
+++ b/Doc/library/heapq.rst
@@ -88,6 +88,21 @@
    >>> print data == ordered
    True
 
+Using a heap to insert items at the correct place in a priority queue:
+
+   >>> heap = []
+   >>> data = [(1, 'J'), (4, 'N'), (3, 'H'), (2, 'O')]
+   >>> for item in data:
+   ...     heappush(heap, item)
+   ...
+   >>> while heap:
+   ...     print heappop(heap)[1]
+   J
+   O
+   H
+   N
+
+   
 The module also offers three general purpose functions based on heaps.
 
 
diff --git a/Doc/library/os.rst b/Doc/library/os.rst
index 1cb450b..6136e41 100644
--- a/Doc/library/os.rst
+++ b/Doc/library/os.rst
@@ -681,10 +681,11 @@
       :func:`fdopen`, or :data:`sys.stdout` or :data:`sys.stderr`, use its :meth:`write`
       method.
 
-The following data items are available for use in constructing the *flags*
-parameter to the :func:`open` function.  Some items will not be available on all
-platforms.  For descriptions of their availability and use, consult
-:manpage:`open(2)`.
+The following constants are options for the *flags* parameter to the
+:func:`open` function.  They can be combined using the bitwise OR operator
+``|``.  Some of them are not available on all platforms.  For descriptions of
+their availability and use, consult the :manpage:`open(2)` manual page or the
+respective documentation for your operating system.
 
 
 .. data:: O_RDONLY
@@ -695,8 +696,7 @@
           O_EXCL
           O_TRUNC
 
-   Options for the *flag* argument to the :func:`open` function. These can be
-   combined using the bitwise OR operator ``|``. Availability: Unix, Windows.
+   These constants are available on Unix and Windows.
 
 
 .. data:: O_DSYNC
@@ -708,8 +708,7 @@
           O_SHLOCK
           O_EXLOCK
 
-   More options for the *flag* argument to the :func:`open` function. Availability:
-   Unix.
+   These constants are only available on Unix.
 
 
 .. data:: O_BINARY
@@ -720,8 +719,7 @@
           O_SEQUENTIAL
           O_TEXT
 
-   Options for the *flag* argument to the :func:`open` function. These can be
-   combined using the bitwise OR operator ``|``. Availability: Windows.
+   These constants are only available on Windows.
 
 
 .. data:: O_ASYNC
@@ -730,8 +728,8 @@
           O_NOFOLLOW
           O_NOATIME
 
-   Options for the *flag* argument to the :func:`open` function. These are
-   GNU extensions and not present if they are not defined by the C library.
+   These constants are GNU extensions and not present if they are not defined by
+   the C library.
 
 
 .. data:: SEEK_SET
diff --git a/Doc/library/re.rst b/Doc/library/re.rst
index c9466af..916feca 100644
--- a/Doc/library/re.rst
+++ b/Doc/library/re.rst
@@ -750,6 +750,11 @@
    were provided.
 
 
+.. attribute:: RegexObject.groups
+
+   The number of capturing groups in the pattern.
+
+
 .. attribute:: RegexObject.groupindex
 
    A dictionary mapping any symbolic group names defined by ``(?P<id>)`` to group
diff --git a/Doc/library/subprocess.rst b/Doc/library/subprocess.rst
index 42e50f6..dae582c 100644
--- a/Doc/library/subprocess.rst
+++ b/Doc/library/subprocess.rst
@@ -207,7 +207,7 @@
    *input* argument should be a string to be sent to the child process, or
    ``None``, if no data should be sent to the child.
 
-   :meth:`communicate` returns a tuple ``(stdout, stderr)``.
+   :meth:`communicate` returns a tuple ``(stdoutdata, stderrdata)``.
 
    Note that if you want to send data to the process's stdin, you need to create
    the Popen object with ``stdin=PIPE``.  Similarly, to get anything other than
@@ -358,8 +358,8 @@
        print >>sys.stderr, "Execution failed:", e
 
 
-Replacing os.spawn\*
-^^^^^^^^^^^^^^^^^^^^
+Replacing the os.spawn family
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 P_NOWAIT example::
 
@@ -386,8 +386,8 @@
    Popen(["/bin/mycmd", "myarg"], env={"PATH": "/usr/bin"})
 
 
-Replacing os.popen\*
-^^^^^^^^^^^^^^^^^^^^
+Replacing os.popen, os.popen2, os.popen3
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 ::
 
@@ -430,8 +430,8 @@
    (child_stdin, child_stdout_and_stderr) = (p.stdin, p.stdout)
 
 
-Replacing popen2.\*
-^^^^^^^^^^^^^^^^^^^
+Replacing functions from the popen2 module
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 .. note::