>>735 これはどう言う意味？
> full grapheme clusters, which are composed of multiple code points.


Character

Note that Character is still evolving and will settle down by the final release of 1.0.
One of the reasons that we use double quote syntax to initialize Characters is that they are expected to be able to hold full grapheme clusters, which are composed of multiple code points. This will roll out in a later beta.

-- Chris Lattner

grapheme 字素
http://m.kotobank.jp/word/グラフィーム