Fix formatter inconsistency with record spread patterns.

crates/aiken-lang/src/format.rs

@@ -839,7 +839,7 @@ impl<'comments> Formatter<'comments> {
 
         if args.is_empty() && with_spread {
             if is_record {
-                name.append("{..}")
+                name.append(" { .. }")
             } else {
                 name.append("(..)")
             }

crates/aiken-lang/src/tests/format.rs

@@ -748,3 +748,25 @@ fn format_pipe_fn() {
 
     assert_fmt(src, expected);
 }
+
+#[test]
+fn match_record() {
+    let src = indoc! { r#"
+      fn foo() {
+        when bar is {
+          Bar { a, b, c } ->
+            Void
+          Bar { a, .. } ->
+            Void
+          Bar { .. } ->
+            Void
+          Bar(a, b, c) ->
+            Void
+          Bar(..) ->
+            Void
+        }
+      }
+    "#};
+
+    assert_fmt(src, src);
+}

examples/acceptance_tests/055/lib/tests.ak

@@ -32,7 +32,7 @@ pub fn size(t: MerkleTree) -> Int {
   when t is {
     Empty ->
       0
-    Leaf{..} ->
+    Leaf { .. } ->
       1
     Node { left, right, .. } ->
       size(left) + size(right)

examples/acceptance_tests/067/lib/tests.ak

@@ -139,7 +139,7 @@ pub fn size(self: MerkleTree<a>) -> Int {
   when self is {
     Empty ->
       0
-    Leaf{..} ->
+    Leaf { .. } ->
       1
     Node { left, right, .. } ->
       size(left) + size(right)

examples/acceptance_tests/074/lib/tests.ak

@@ -44,7 +44,7 @@ pub fn size(self: MerkleTree<a>) -> Int {
   when self is {
     Empty ->
       0
-    Leaf{..} ->
+    Leaf { .. } ->
       1
     Node { left, right, .. } ->
       size(left) + size(right)