Test consistency of grapheme cluster segmentation with canonical equivalence some more

[eggrobin]

… and fix it.

UTC-180-C19 Consensus: Assign the Other_Grapheme_Extend property to U+0CC0, U+0CC7, U+0CC8, and U+0CCA, U+0CCB (Kannada vowel signs II, EE, AI, O, and OO), as well as U+1B3B, U+1B3D, and U+1B43 (Balinese vowel signs ra repa tedung, la lenga tedung, and pepet tedung), thereby changing their Grapheme_Cluster_Break property from SpacingMark to Extend, ensuring consistency of legacy grapheme clusters with canonical equivalence. For Unicode 16.0. See L2/24-162 item 6.2, PRI-494#ID20240422114157, and PRI-494#ID20240422120150.

See https://github.com/unicode-org/properties/issues/287.

Previously: #645.

[macchiati]

LGTM Might want to wait for props meeting, in case anyone has qualms.

[eggrobin]

Might want to wait for props meeting, in case anyone has qualms.

Might want to wait for UTC, since it is a change to the property assignments of existing characters!

[macchiati]

dooooh ... even better

[markusicu]

Test still fails:

[INFO] Running org.unicode.text.UCD.TestTestUnicodeInvariants
Error: Got unexpected property values: 1
0CCB          ; Extend≠SpacingMark #      (ೋ)  KANNADA VOWEL SIGN OO

[eggrobin]

Test still fails

I know, I commented on that on the PAG issue. Will fix it here.

[markusicu]

lgtm