rust-lang/rust — pull request #15986 by Florob (2014-07-25 21:10:52+00:00)
Title: Add support for NFC and NFKC

This adds a new `Recompositions` iterator, which performs canonical composition on the result of the `Decompositions` iterator (which is canonical or compatibility decomposition). In effect this implements Unicode normalization forms C and KC.