Add a test for #2178

Author: topecongiro

tests/source/expr.rs

@@ -355,3 +355,7 @@ fn newlines_between_list_like_expr() {
         _ => bar(),
     };
 }
+
+fn issue2178() {
+    Ok(result.iter().map(|item| ls_util::rls_to_location(item)).collect())
+}

tests/target/expr.rs

@@ -408,3 +408,10 @@ fn newlines_between_list_like_expr() {
         _ => bar(),
     };
 }
+
+fn issue2178() {
+    Ok(result
+        .iter()
+        .map(|item| ls_util::rls_to_location(item))
+        .collect())
+}