Update write_shared.rs

Author: notriddle

src/librustdoc/html/render/write_shared.rs

@@ -378,7 +378,7 @@ impl CrateInfo {
                 let mut files: Vec<Result<PathBuf, std::io::Error>> = try_err!(std::fs::read_dir(dir), dir.as_path())
                     .map(|file| Ok(file?.path()))
                     .collect();
-                files.sort_by_key(|p| p.as_ref().map_err(|_| ()).clone().unwrap_or(PathBuf::new()));
+                files.sort_by_key(|p| p.as_ref().map_or(PathBuf::new(), |p| p.clone()));
                 acc.append(&mut files
                     .into_iter()
                     .filter_map(|file| {