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Capitalise title-case word after an opening apostrophe

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Found while testing crates/doc/src/text.rs:138 (TextCase::apply_after; is_word_char at :153 counts ' and U+2019 as word characters)

Co-Authored-By: Claude Haiku 5.5 <noreply@anthropic.com>
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
This commit is contained in:
NetterSilver
2026-10-22 13:36:45 +00:00
co-authored by Claude Haiku 5.5
parent 9ec80bf2c2
commit ddeceb17b3
1 changed files with 17 additions and 1 deletions
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crates/doc/src/text.rs
+17 -1
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@@ -129,14 +129,17 @@ impl TextCase {
TextCase::Title => {
let mut out = String::with_capacity(s.len());
let mut start = prev.is_none_or(|c| !is_word_char(c));
let mut before = prev;
for ch in s.chars() {
if start && ch.is_alphanumeric() {
out.extend(ch.to_uppercase());
start = false;
} else {
out.push(ch);
start = !is_word_char(ch);
// An apostrophe only continues a word right after a letter or digit.
start = !is_word_char(ch) || (!ch.is_alphanumeric() && !before.is_some_and(|c| c.is_alphanumeric()));
}
before = Some(ch);
}
out
}
@@ -831,3 +834,16 @@ mod case_tests {
assert_eq!(t.para_list(0), ParaList::default());
}
}
#[cfg(test)]
mod title_case_tests {
use super::TextCase;
#[test]
fn title_case_after_opening_apostrophe() {
assert_eq!(TextCase::Title.apply("'hello world'"), "'Hello World'");
assert_eq!(TextCase::Title.apply("say 'hi'"), "Say 'Hi'");
assert_eq!(TextCase::Title.apply("don't"), "Don't");
assert_eq!(TextCase::Title.apply("\u{2019}hello"), "\u{2019}Hello");
}
}