The AAT `ankr` anchor point table is an auxiliary table for `kerx`,
used to store anchor overrides in case the glyph itself does not
supply the needed anchors as control points. Among the fonts that
come pre-installed with MacOS 10.12.6, `ankr` is used by a handful
of non-Latin fonts such as “Myanmar MN”, “Devanagari Sangam MN”,
and “Arial HB”.
https://developer.apple.com/fonts/TrueType-Reference-Manual/RM06/Chap6ankr.html
Other metamorphosis types are not yet supported and will raise an error
upon decompilation. The TTX tool catches the error and continues to emit
a hexdump of the table contents, just as before this change.
Interestingly, this can handle the examples from the AAT specification
(which are part of the unit tests), and also most AAT fonts on my disk.
However, some other AAT fonts such as Apple Chancery cannot be decompiled.
The failure seems to be a general problem with how fonttools decompiles
AAT lookups of format 4, and unrelated to this present change.
When running tox locally during development, there's no need to also test python 3.5.
2.7 and 3.6 are enough, and the CI takes care of the others (3.4, 3.5, pypy, etc.).
In the latest PyPI release 3.6.0, an incosistency in the title levels between
README.rst and NEWS.rst caused PyPI to not correctly format the reStructuredText
document.
I've fixed the PKG-INFO manually for the current release:
https://pypi.python.org/pypi/FontTools/3.6.0
The next release should be fine.
