Fixup titlecase docs, prep for v0.0.6 release

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "roe"
-version = "0.0.5" # remember to set `html_root_url` in `src/lib.rs`.
+version = "0.0.6" # remember to set `html_root_url` in `src/lib.rs`.
 authors = ["Ryan Lopopolo <[email protected]>"]
 license = "MIT"
 edition = "2018"

README.md

@@ -36,7 +36,7 @@ Add this to your `Cargo.toml`:
 
 ```toml
 [dependencies]
-roe = "0.0.5"
+roe = "0.0.6"
 ```
 
 Then convert case like:

src/lib.rs

@@ -100,7 +100,7 @@
 //! [conventionally UTF-8 binary strings]: https://docs.rs/bstr/1.*/bstr/#when-should-i-use-byte-strings
 
 #![no_std]
-#![doc(html_root_url = "https://docs.rs/roe/0.0.5")]
+#![doc(html_root_url = "https://docs.rs/roe/0.0.6")]
 
 #[cfg(any(feature = "alloc", test))]
 extern crate alloc;
@@ -566,8 +566,8 @@ impl FromStr for TitlecaseMode {
 }
 
 /// Returns an iterator that yields a copy of the bytes in the given slice with
-/// the leading letter replaced with their titlecase counterpart, and rest
-/// letters replaced with their titlecase counterparts.
+/// the leading letter replaced with its titlecase counterpart and all remaining
+/// letters replaced with their lowercase counterparts.
 ///
 /// This function treats the given slice as a [conventionally UTF-8 string].
 /// UTF-8 byte sequences are converted to their Unicode titlecase equivalents.

src/unicode/titlecase.rs

@@ -2,12 +2,14 @@ use crate::unicode::std_case_mapping_iter::CaseMappingIter;
 use crate::unicode::ucd_generated_case_mapping::SORTED_TITLECASE_MAPPING;
 use core::iter::FusedIterator;
 
-/// Take a char and return its Unicode titlecase as 3 chars.
+/// Take a [`char`] and return its Unicode titlecase as 3 `char`s.
+///
+/// Trailing NUL bytes in the returned array should be ignored.
 ///
 /// # Examples
 ///
 /// ```
-/// # use roe::to_titlecase;
+/// use roe::to_titlecase;
 ///
 /// assert_eq!(to_titlecase('DŽ'), ['Dž', '\0', '\0']);
 ///
@@ -20,8 +22,6 @@ use core::iter::FusedIterator;
 /// // A character already titlecased map to itself
 /// assert_eq!(to_titlecase('A'), ['A', '\0', '\0']);
 /// ```
-///
-/// [Ruby `ArgumentError` Exception class]: https://ruby-doc.org/core-3.1.2/ArgumentError.html
 #[allow(clippy::module_name_repetitions)]
 #[must_use]
 pub fn to_titlecase(c: char) -> [char; 3] {