norad default UFO serialization format

[chrissimpkins]

Thread to track the stability of the norad UFO write format.

Current status: unstable
norad v1.0 tracker: linebender/norad#195

Defaults:

• line endings: line feed (\n) across plist, glif, and fea files on all platforms
• spacing: single tab per level
• XML declaration header quote style around attributes: double quotes
• plist lib keys are sorted in lexicographic ordering by Unicode code point value (see norad default UFO serialization format #22 (comment))

	glif	plist	fea
line ending	line feed	line feed	line feed
XML declaration	double quotes	double quotes	n/a
indentation spacing	single tab	single tab	n/a

[chrissimpkins]

plist lib key sorting order changes linebender/norad#147

This approach supports lexicographic ordering by Unicode code point value as defined in the str type docs:

Strings are ordered lexicographically by their byte values. This orders Unicode code points based on their positions in the code charts. This is not necessarily the same as “alphabetical” order, which varies by language and locale. Sorting strings according to culturally-accepted standards requires locale-specific data that is outside the scope of the str type.

[chrissimpkins]

Line endings: #4 (comment)

[chrissimpkins]

The decision was made to make line feeds the default serialization approach on plist, glif, and fea files across platforms.

linebender/norad#172

[chrissimpkins]

plist dict elements: linebender/norad#179

[chrissimpkins]

floating point numbers: linebender/norad#164