Fix Encoding file entries for astral characters.

Early versions of the UCS Font Manager (3.41-3.42) supported the
use of /uni followed by up to 8 upper-case hex digits to specify
the Unicode codepoint represented by a glyph.

Font Manager 3.43 changed this behaviour to align with Adobe's
then-current specification of /uniXXXX for characters in the
Basic Multilingual Plane and /uniXXXXYYYY for all other characters
(where XXXX is a high UTF-16 surrogate and YYYY is a low surrogate)

Font Manager 3.53 changed again to remove support for /uniXXXXYYYY
and, instead, introduced support for /uXXXX to /uXXXXXXXX, where
leading zeroes are forbidden if more than 4 hex digits are present.

Change our behaviour to use the /uniXXXX form for characters in
the Basic Multilingual Plane (which is supported by all versions
of the UCS Font Manager) and use the /uXXXXX - /uXXXXXXXX form
for all other characters.

This effectively means that Font Manager 3.53 or later is required
when astral characters are in use.

0 files changed, 0 insertions, 0 deletions