diff --git a/src/builtin/macros.rs b/src/builtin/macros.rs
index 9dbcfdc..cd1f8c6 100644
--- a/src/builtin/macros.rs
+++ b/src/builtin/macros.rs
@@ -29,10 +29,20 @@ macro_rules! max_args {
     ($args:ident, $count:literal) => {
         if $args.len() > $count {
             if $count > 1 {
-                return Err(format!("Only {} arguments allowed, but {} were passed.", $count, $args.len()).into());
+                return Err(format!(
+                    "Only {} arguments allowed, but {} were passed.",
+                    $count,
+                    $args.len()
+                )
+                .into());
             } else {
-                return Err(format!("Only {} argument allowed, but {} were passed.", $count, $args.len()).into());
+                return Err(format!(
+                    "Only {} argument allowed, but {} were passed.",
+                    $count,
+                    $args.len()
+                )
+                .into());
             }
         }
     };
-}
\ No newline at end of file
+}
diff --git a/tests/styles.rs b/tests/styles.rs
index de902dc..872c9fc 100644
--- a/tests/styles.rs
+++ b/tests/styles.rs
@@ -130,8 +130,4 @@ test!(
     "a {\n  color:red\n}\n",
     "a {\n  color: red;\n}\n"
 );
-test!(
-    removes_null_value,
-    "a {\n  color: null;\n}\n",
-    ""
-);
+test!(removes_null_value, "a {\n  color: null;\n}\n", "");