remove where brace newline

Author: csmoe

src/items.rs

@@ -683,8 +683,12 @@ pub fn format_impl(
 
         if is_impl_single_line(context, items, &result, &where_clause_str, item)? {
             result.push_str(&where_clause_str);
-            if where_clause_str.contains('\n') || last_line_contains_single_line_comment(&result) {
-                result.push_str(&format!("{}{{{}}}", &sep, &sep));
+            if where_clause_str.contains('\n') {
+                if last_line_contains_single_line_comment(&result) {
+                    result.push_str(&format!("{}{{{}}}", &sep, &sep));
+                } else {
+                    result.push_str("\n{}");
+                }
             } else {
                 result.push_str(" {}");
             }

tests/source/configs/where_single_line/true.rs

@@ -22,3 +22,5 @@ where
 fn lorem<Ipsum, Dolor, Sit, Amet>() -> T where Ipsum: Eq {
     // body
 }
+
+unsafe impl Sync for Foo where (): Send {}

tests/target/configs/where_single_line/true.rs

@@ -26,3 +26,8 @@ fn lorem<Ipsum, Dolor, Sit, Amet>() -> T
 where Ipsum: Eq {
     // body
 }
+
+unsafe impl Sync for Foo
+where
+    (): Send,
+{}