feat: expand multi-item let-in

src/rules/let_in.rs

@@ -6,8 +6,20 @@ pub fn rule(
 
     let mut children = crate::children::Children::new(build_ctx, node);
 
+    let items_count = node
+        .children()
+        .filter(|element| match element.kind() {
+            rnix::SyntaxKind::NODE_KEY_VALUE
+            | rnix::SyntaxKind::NODE_INHERIT
+            | rnix::SyntaxKind::NODE_INHERIT_FROM => true,
+            _ => false,
+        })
+        .count();
+
     let layout = if children.has_comments() {
         &crate::config::Layout::Tall
+    } else if items_count > 1 {
+        &crate::config::Layout::Tall
     } else {
         build_ctx.config.layout()
     };

tests/cases/let_in/in

@@ -1,4 +1,6 @@
 let
+  /**/
+  a = let b=2; c=3; in d;
   /**/
   a = let       c=1;       in       f;
   /**/

tests/cases/let_in/out

@@ -1,5 +1,12 @@
 let
   /**/
+  a =
+    let
+      b = 2;
+      c = 3;
+    in
+      d;
+  /**/
   a = let c = 1; in f;
   /**/
   a =