Minor improvements

src/lib.rs

@@ -21,8 +21,8 @@
 //! However, the following invariants will always be upheld:
 //!
 //! - The encoding will be compatible with UTF-8. In particular, splitting an
-//!   encoded byte sequence by a UTF-8–encoded character always produces other
-//!   valid byte sequences. They can be re-encoded without error using
+//!   encoded byte sequence by a UTF-8–encoded character always produces
+//!   other valid byte sequences. They can be re-encoded without error using
 //!   [`RawOsString::into_os_string`] and similar methods.
 //!
 //! - All characters valid in platform strings are representable. [`OsStr`] and

src/windows/wtf8/code_points.rs

@@ -15,7 +15,7 @@ where
 {
     iter: Peekable<I>,
     surrogate: bool,
-    utf8: bool,
+    still_utf8: bool,
 }
 
 impl<I> CodePoints<I>
@@ -29,12 +29,12 @@ where
         Self {
             iter: string.into_iter().peekable(),
             surrogate: false,
-            utf8: true,
+            still_utf8: true,
         }
     }
 
     pub(super) fn is_still_utf8(&self) -> bool {
-        self.utf8
+        self.still_utf8
     }
 
     fn consume_next(&mut self, code_point: &mut u32) -> Result<()> {
@@ -107,7 +107,7 @@ where
                 } else if code_point & 0xFE0 == 0x360 {
                     if code_point & 0x10 == 0 {
                         self.surrogate = true;
-                        self.utf8 = false;
+                        self.still_utf8 = false;
                     } else if prev_surrogate {
                         // Decoding a broken surrogate pair would be lossy.
                         invalid = true;

src/windows/wtf8/string.rs

@@ -3,17 +3,20 @@ use crate::util;
 const SURROGATE_LENGTH: usize = 3;
 
 pub(crate) fn ends_with(string: &[u8], mut suffix: &[u8]) -> bool {
-    let index = match string.len().checked_sub(suffix.len()) {
-        Some(index) => index,
-        None => return false,
+    let index = if let Some(index) = string.len().checked_sub(suffix.len()) {
+        index
+    } else {
+        return false;
     };
     if let Some(&byte) = string.get(index) {
         if util::is_continuation(byte) {
             let index = expect_encoded!(index.checked_sub(1));
-            let mut wide_surrogate = match suffix.get(..SURROGATE_LENGTH) {
-                Some(surrogate) => super::encode_wide(surrogate),
-                None => return false,
-            };
+            let mut wide_surrogate =
+                if let Some(surrogate) = suffix.get(..SURROGATE_LENGTH) {
+                    super::encode_wide(surrogate)
+                } else {
+                    return false;
+                };
             let surrogate_wchar = wide_surrogate
                 .next()
                 .expect("failed decoding non-empty suffix");
@@ -35,9 +38,12 @@ pub(crate) fn ends_with(string: &[u8], mut suffix: &[u8]) -> bool {
 pub(crate) fn starts_with(string: &[u8], mut prefix: &[u8]) -> bool {
     if let Some(&byte) = string.get(prefix.len()) {
         if util::is_continuation(byte) {
-            let index = match prefix.len().checked_sub(SURROGATE_LENGTH) {
-                Some(index) => index,
-                None => return false,
+            let index = if let Some(index) =
+                prefix.len().checked_sub(SURROGATE_LENGTH)
+            {
+                index
+            } else {
+                return false;
             };
             let (substring, surrogate) = prefix.split_at(index);
             let mut wide_surrogate = super::encode_wide(surrogate);