Link to Unicode SpecialCasing.txt document
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@ -235,7 +235,7 @@ pub trait UnicodeChar {
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/// The case-folding performed is the common or simple mapping: it maps
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/// one Unicode codepoint (one character in Rust) to its uppercase
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/// equivalent according to the Unicode database [1]. The additional
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/// `SpecialCasing.txt` is not considered here, as it expands to multiple
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/// [`SpecialCasing.txt`] is not considered here, as it expands to multiple
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/// codepoints in some cases.
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///
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/// A full reference can be found here [2].
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@ -247,6 +247,8 @@ pub trait UnicodeChar {
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///
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/// [1]: ftp://ftp.unicode.org/Public/UNIDATA/UnicodeData.txt
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///
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/// [`SpecialCasing`.txt`]: ftp://ftp.unicode.org/Public/UNIDATA/SpecialCasing.txt
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///
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/// [2]: http://www.unicode.org/versions/Unicode4.0.0/ch03.pdf#G33992
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fn to_uppercase(&self) -> char;
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