rust: use `matches!` macro now that we're using Rust 1.42+

rust/hg-core/src/utils.rs

@@ -198,8 +198,9 b" impl<'a> Escaped for &'a HgPath {"
 
 #[cfg(unix)]
 pub fn shell_quote(value: &[u8]) -> Vec<u8> {
-    // TODO: Use the `matches!` macro when we require Rust 1.42+
-    if value.iter().all(|&byte| match byte {
+    if value.iter().all(|&byte| {
+        matches!(
+            byte,
         b'a'..=b'z'
         | b'A'..=b'Z'
         | b'0'..=b'9'
@@ -207,8 +208,8 b' pub fn shell_quote(value: &[u8]) -> Vec<'
         | b'_'
         | b'/'
         | b'+'
-        | b'-' => true,
-        _ => false,
+            | b'-'
+        )
     }) {
         value.to_owned()
     } else {