- fix when /Private follows /CharStrings instead of vv
- fix expected ND and PD values
- handle the case where lenIV is not 4 (writing)
- write /Subrs properly, not just the "standard 5"
* Replaced all from ...py23 import * with explicit name imports, or removed completely when possible.
* Replaced tounicode() with tostr()
* Changed all BytesIO ans StringIO imports to from io import ..., replaced all UnicodeIO with StringIO.
* Replaced all unichr() with chr()
* Misc minor tweaks and fixes
The T1 spec (https://www-cdf.fnal.gov/offline/PostScript/T1_SPEC.PDF) on
page 14 says that:
> The text encrypted by eexec must be followed by 512 ASCII zeros. There may be
> white space characters (blank, tab, carriage return or line feed)
> interspersed among these zeros.
* Add a failing test case with white space characters interspersed
among the trailing zeros after the eexec
* Fix eexec end finding so that it passes this new test case
* fix two cases where pathlib.Path objects were not accepted
* make macRes reader accept os.PathLike objects
* use __fspath__ explicitly to support os.PathLike paths
* use __fspath__ explicitly to support os.PathLike paths
* convert tmpdir to str
* only test pathlib.Path on Python 3.6 and up
