fixup! Merge configs from parent directories

Author: ayazhafiz

rustfmt-core/rustfmt-bin/src/bin/main.rs

@@ -488,7 +488,7 @@ fn format(opt: Opt) -> Result<i32> {
     if opt.verbose {
         if let Some(paths) = config_paths.as_ref() {
             println!(
-                "Using rustfmt config files {}",
+                "Using rustfmt config file(s) {}",
                 paths
                     .into_iter()
                     .map(|p| p.display().to_string())

rustfmt-core/rustfmt-lib/src/config.rs

@@ -273,14 +273,10 @@ impl Config {
 
             // List of closest -> most distant rustfmt config from the current directory.
             let config_paths: Option<Vec<_>> = paths.into_iter().filter(|p| p.is_some()).collect();
-            let has_paths = config_paths.as_ref().and_then(|paths| {
-                if paths.is_empty() {
-                    None
-                } else {
-                    Some(paths.len())
-                }
-            });
-            if has_paths.is_some() {
+            let has_paths = config_paths
+                .as_ref()
+                .map_or(false, |paths| !paths.is_empty());
+            if has_paths {
                 return Ok(config_paths);
             }
 

rustfmt-core/rustfmt-lib/src/config/options.rs

@@ -292,8 +292,7 @@ impl IgnoreList {
                 p.strip_prefix(new_rustfmt_toml_path.parent().unwrap())
                     .map(PathBuf::from)
             })
-            .filter(|p| p.is_ok())
-            .map(|p| p.unwrap())
+            .flatten()
             .collect();
 
         let mut path_set = other.path_set;