Wrap the parameter sets in parenthesis.

src/compare/macros.rs

@@ -1,6 +1,18 @@
+macro_rules! compare_noop {
+    ($($field:expr),+) => {
+        $(
+        EmacsField::Required(":foo"),
+        compare_identity,
+        impl_compare_noop
+),+
+    };
+}
+
+pub(crate) use compare_noop;
+
 /// Create iterators for ast nodes where it only has to iterate over children
 macro_rules! compare_properties {
-    ($emacs:expr, $rust:expr, $($emacs_field:expr, $rust_value_getter:expr, $compare_fn: ident),+) => {
+    ($emacs:expr, $rust:expr, $(($emacs_field:expr, $rust_value_getter:expr, $compare_fn: expr)),+) => {
         {
             let mut this_status = DiffStatus::Good;
             let mut message: Option<String> = None;
@@ -36,7 +48,7 @@ macro_rules! compare_properties {
                 },
                 EmacsField::Optional(_name) => {},
             }
-            ),+
+            )+
 
             if !emacs_keys.is_empty() {
                 let unexpected_keys: Vec<&str> = emacs_keys.into_iter().collect();
@@ -66,7 +78,7 @@ macro_rules! compare_properties {
                 },
                 _ => {}
             }
-            ),+
+            )+
 
             match this_status {
                 DiffStatus::Good => {