Add various items

Doc/whatsnew/2.7.rst

@@ -103,7 +103,23 @@ changes, sorted alphabetically by module name. Consult the
 :file:`Misc/NEWS` file in the source tree for a more complete list of
 changes, or look through the Subversion logs for all the details.
 
-* To be written.
+* A new function in the :mod:`subprocess` module,
+  :func:`check_output`, runs a command with a specified set of arguments
+  and returns the command's output as a string if the command runs without
+  error, or raises a :exc:`CalledProcessError` exception otherwise.
+
+  ::
+
+    >>> subprocess.check_output(['df', '-h', '.'])
+    'Filesystem     Size   Used  Avail Capacity  Mounted on\n
+    /dev/disk0s2    52G    49G   3.0G    94%    /\n'
+
+    >>> subprocess.check_output(['df', '-h', '/bogus'])
+      ...
+    subprocess.CalledProcessError: Command '['df', '-h', '/bogus']' returned non-zero exit status 1
+
+  (Contributed by Gregory P. Smith.)
+
 
 .. ======================================================================
 .. whole new modules get described in subsections here
@@ -116,13 +132,22 @@ Build and C API Changes
 
 Changes to Python's build process and to the C API include:
 
-* To be written.
+* If you use the :file:`.gdbinit` file provided with Python,
+  the "pyo" macro in the 2.7 version will now work when the thread being
+  debugged doesn't hold the GIL; the macro will now acquire it before printing.
+  (Contributed by haypo XXX; :issue:`3632`.)
 
 .. ======================================================================
 
 Port-Specific Changes: Windows
 -----------------------------------
 
+* The :mod:`msvcrt` module now contains some constants from
+  the :file:`crtassem.h` header file:
+  :data:`CRT_ASSEMBLY_VERSION`,
+  :data:`VC_ASSEMBLY_PUBLICKEYTOKEN`,
+  and :data:`LIBRARIES_ASSEMBLY_NAME_PREFIX`.
+  (Added by Martin von Loewis (XXX check); :issue:`4365`.)
 
 .. ======================================================================