Apply formatting to macro bodies

Run `ci/style.sh` with the changes introduced in [1].

[1]: #4107

src/fixed_width_ints.rs

@@ -20,7 +20,16 @@ pub type uint32_t = u32;
 pub type uint64_t = u64;
 
 cfg_if! {
-    if #[cfg(all(target_arch = "aarch64", not(any(target_os = "windows", target_os = "macos", target_os = "ios", target_os = "tvos", target_os = "watchos"))))] {
+    if #[cfg(all(
+        target_arch = "aarch64",
+        not(any(
+            target_os = "windows",
+            target_os = "macos",
+            target_os = "ios",
+            target_os = "tvos",
+            target_os = "watchos"
+        ))
+    ))] {
         // This introduces partial support for FFI with __int128 and
         // equivalent types on platforms where Rust's definition is validated
         // to match the standard C ABI of that platform.
@@ -93,7 +102,15 @@ cfg_if! {
 
         // static_assert_eq!(core::mem::size_of::<__uint128_t>(), _SIZE_128);
         // static_assert_eq!(core::mem::align_of::<__uint128_t>(), _ALIGN_128);
-    } else if #[cfg(all(target_arch = "aarch64", any(target_os = "macos", target_os = "ios", target_os = "tvos", target_os = "watchos")))] {
+    } else if #[cfg(all(
+        target_arch = "aarch64",
+        any(
+            target_os = "macos",
+            target_os = "ios",
+            target_os = "tvos",
+            target_os = "watchos"
+        )
+    ))] {
         /// C `__int128_t`
         pub type __int128_t = i128;
         /// C `__uint128_t`