Without this option, AppVeyor log is too unreadable.
(cherry picked from commit 8886d5f3)

* bpo-27593: Updates Windows build to use information from git (#262)

* bpo-27593: Updates Windows build to use information from git

* Fixes git command (#451)

(cherry picked from commit 8eb531d9)

(cherry picked from commit ed6795e4)

mention bpo-28929 in the Documentation section of
What's New in Python 2.7.14

* Use PyVarObject_HEAD_INIT instead of PyObject_HEAD_INIT on type struct header.
* Backport many minor fixes from Python 3 doc to minimize diff.

PyEval_ReInitThread can run arbitrary Python code, which really ought to have
the TLS initialized.

* bpo-29602: fix signed zero handling in complex constructor

* Add missing have_getformat definition; remove use of unittest subtests.

bpo-29347: Fix possibly dereferencing undefined pointers when creating weakref objects (#128) (#187)

(cherry picked from commit b2ee40ed)

It was accidentally added in cc798377.

Change the documentation's `Show Source` link on the left menu
to GitHub source file.

* Support "bpo-" in Misc/NEWS (#1)
Change the url to 2.7

(cherry picked from commit 79ab8be0)

* pyspecific.py: remove space after` bpo-`

There were some grammatical errors in weakref.WeakValueDictionary
documentation.

Add canonical header link on each page to corresponding major version of the documentation.

Patch by Matthias Bussonnier.

using PySlice_GetIndicesEx() in debug builds.

variables.

buffer object with custom index object.

Some of the details of comparing mixed types were incorrect or ambiguous.
Added default behaviour and consistency suggestions for user-defined classes.
Based on patch from Andy Maier.