std: Rename str::Normalizations to str::Decompositions

The Normalizations iterator has been renamed to Decompositions.
It does not currently include all forms of Unicode normalization,
but only encompasses decompositions.
If implemented recomposition would likely be a separate iterator
which works on the result of this one.

[breaking-change]

src/libcore/char.rs

@@ -30,9 +30,9 @@ use iter::{Iterator, range_step};
 use unicode::{derived_property, property, general_category, conversions};
 
 /// Returns the canonical decomposition of a character.
-pub use unicode::decompose::decompose_canonical;
+pub use unicode::normalization::decompose_canonical;
 /// Returns the compatibility decomposition of a character.
-pub use unicode::decompose::decompose_compatible;
+pub use unicode::normalization::decompose_compatible;
 
 #[cfg(not(test))] use cmp::{Eq, Ord, TotalEq, TotalOrd, Ordering};
 #[cfg(not(test))] use default::Default;

src/libcore/unicode.rs

@@ -104,7 +104,7 @@ pub mod general_category {
 
 }
 
-pub mod decompose {
+pub mod normalization {
     use option::Option;
     use option::{Some, None};
     use slice::ImmutableVector;