Fumiaki MATSUSHIMA bdcfdef214 Update Unicode Version to 9.0.0 ...

9.0.0 was released on June 21, 2016

http://blog.unicode.org/2016/06/announcing-unicode-standard-version-90.html

http://www.unicode.org/versions/Unicode9.0.0/

There are some changes about grapheme cluster in Unicode 9.0.0:

http://unicode.org/reports/tr29/#Grapheme_Cluster_Boundary_Rules

------------

I noticed that `unpack_graphemes` returns [Other] when the argument is Other ÷ Prepend
(it must be [Other, Prepend]).
But in [Unicode 8.0.0's Prepend has no characters](http://www.unicode.org/reports/tr29/tr29-27.html#Prepend)
so we don't have to backport following patch:

```diff
should_break =
+ if pos == eoc
+   true
```

2017-01-28 16:57:36 +09:00

1.1 MiB

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