removed trailing whitespace

src/bookmarks.rs

@@ -105,7 +105,7 @@ impl Bookmarks {
         Ok(path)
     }
 
-    /// 
+    ///
     pub fn remove_invalid_paths(&mut self) -> Result<()> {
         self.bookmarks.retain(|_, path| path.is_dir());
         self.write_bookmark_file()?;