feat: no extra space in patterns

src/rules/pattern.rs

@@ -153,8 +153,9 @@ pub fn rule(
     // }
     let child = children.get_next().unwrap();
     steps.push_back(crate::builder::Step::Dedent);
-    if !has_comments_between_curly_b && items_count <= 1 {
+    if !has_comments_between_curly_b && items_count == 1 {
         steps.push_back(crate::builder::Step::Whitespace);
+    } else if !has_comments_between_curly_b && items_count == 0 {
     } else {
         if let rnix::SyntaxKind::NODE_PAT_ENTRY = last_kind {
             steps.push_back(crate::builder::Step::Token(

tests/cases/lambda/out

@@ -7,7 +7,7 @@
       d
   )
   (
-    { }:
+    {}:
       b:
       /*
        c
@@ -16,7 +16,7 @@
   )
   (
     a:
-      { }:
+      {}:
       /*
        c
        */
@@ -64,7 +64,7 @@
   )
   (
     a: b: c:
-      { }:
+      {}:
         a: b: c:
           a
   )

tests/cases/pat_bind/out

@@ -1,19 +1,19 @@
 [
-  ({ } @ a: _)
+  ({} @ a: _)
   (
-    { } @
+    {} @
     /**/
     a:
       _
   )
   (
-    { }
+    {}
     /**/
     @ a:
       _
   )
   (
-    { }
+    {}
     /**/
     @
     /**/
@@ -21,17 +21,17 @@
       _
   )
 
-  (a @ { }: _)
+  (a @ {}: _)
   (
     a @
     /**/
-    { }:
+    {}:
       _
   )
   (
     a
     /**/
-    @ { }:
+    @ {}:
       _
   )
   (
@@ -39,7 +39,7 @@
     /**/
     @
     /**/
-    { }:
+    {}:
       _
   )
 ]

tests/cases/pattern/out

@@ -8,7 +8,7 @@
     @ inp:
       _
   )
-  ({ }: _)
+  ({}: _)
   ({ a }: _)
   (
     {