style: cargo fmt sweep

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/libraries.rs

@@ -71,7 +71,8 @@ impl Library {
         if self.excluded_dirs.is_empty() {
             return globals.to_vec();
         }
-        let mut combined: Vec<String> = Vec::with_capacity(globals.len() + self.excluded_dirs.len());
+        let mut combined: Vec<String> =
+            Vec::with_capacity(globals.len() + self.excluded_dirs.len());
         combined.extend_from_slice(globals);
         combined.extend(self.excluded_dirs.iter().cloned());
         combined