Prefer println!() to println!("")

src/bin/cargo-fmt.rs

@@ -387,7 +387,7 @@ fn format_files(
         for f in files {
             print!(" {}", f.display());
         }
-        println!("");
+        println!();
     }
     let mut command = Command::new("rustfmt")
         .stdout(stdout)

src/config.rs

@@ -478,7 +478,7 @@ macro_rules! create_config {
                     $(
                         println!("{}{}", space_str, $dstring);
                     )+
-                    println!("");
+                    println!();
                 )+
             }
         }