feat: no extra space in attr-sets

src/rules/attr_set.rs

@@ -127,7 +127,9 @@ pub fn rule(
             steps.push_back(crate::builder::Step::Pad);
         }
         crate::config::Layout::Wide => {
-            steps.push_back(crate::builder::Step::Whitespace);
+            if items_count > 0 {
+                steps.push_back(crate::builder::Step::Whitespace);
+            }
         }
     }
     steps.push_back(crate::builder::Step::Format(child.element));

tests/cases/attr_set/out

@@ -1,5 +1,5 @@
 [
-  { }
+  {}
   {
     /*
      a
@@ -101,7 +101,7 @@
       a = {
         a = rec {
           a = {
-            a = rec { a = { a = rec { a = { a = rec { a = { }; }; }; }; }; };
+            a = rec { a = { a = rec { a = { a = rec { a = {}; }; }; }; }; };
           };
         };
       };

tests/cases/key_value/out

@@ -94,13 +94,13 @@ rec
     b = 1;
     c = 2;
   };
-  n = pkgs: { };
+  n = pkgs: {};
   o =
     {
       pkgs,
       ...
     }:
-    { };
+    {};
 
   a
   /*
@@ -117,6 +117,6 @@ rec
     ;
 
   p =
-    aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa { }
+    aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa {}
     a;
 }

tests/cases/lambda/out

@@ -57,7 +57,7 @@
   )
   (
     {
-      pkgs ? import ./.. { },
+      pkgs ? import ./.. {},
       locationsXml,
     }:
       null