fix: use Self and don't depend on nightly features

src/diff.rs

@@ -35,9 +35,9 @@ enum DiffStatus {
 impl DiffStatus {
   fn char(self) -> impl fmt::Display {
     match self {
-      DiffStatus::Added => "A".green(),
-      DiffStatus::Removed => "R".red(),
-      DiffStatus::Changed => "C".yellow(),
+      Self::Added => "A".green(),
+      Self::Removed => "R".red(),
+      Self::Changed => "C".yellow(),
     }
   }
 }

src/store.rs

@@ -41,7 +41,8 @@ fn path_to_canonical_string(path: &Path) -> Result<String> {
   let path = path.into_os_string().into_string().map_err(|path| {
     anyhow!(
       "failed to convert path '{path}' to valid unicode",
-      path = path.display(),
+      path = Path::new(&*path).display(), /* TODO: use .display() directly
+                                           * after Rust 1.87.0 in flake. */
     )
   })?;