Fix line length

Author: Aaron1011

src/macros.rs

@@ -152,7 +152,9 @@ cfg_if! {
     if #[cfg(feature = "extern-const-fn")] {
         #[allow(unused_macros)]
         macro_rules! f {
-            ($(pub $({$constness:ident})* fn $i:ident($($arg:ident: $argty:ty),*) -> $ret:ty {
+            ($(pub $({$constness:ident})* fn $i:ident(
+                        $($arg:ident: $argty:ty),*
+            ) -> $ret:ty {
                 $($body:stmt);*
             })*) => ($(
                 #[inline]
@@ -164,7 +166,9 @@ cfg_if! {
     } else {
         #[allow(unused_macros)]
         macro_rules! f {
-            ($(pub $({$constness:ident})* fn $i:ident($($arg:ident: $argty:ty),*) -> $ret:ty {
+            ($(pub $({$constness:ident})* fn $i:ident(
+                        $($arg:ident: $argty:ty),*
+            ) -> $ret:ty {
                 $($body:stmt);*
             })*) => ($(
                 #[inline]