fixed linter

Author: iasergunin

.golangci.yml

@@ -85,6 +85,14 @@ issues:
       linters:
         - wsl
       text: "only cuddled expressions if assigning variable or using from line above"
+    - path: _test\.go
+      linters:
+        - wsl
+      text: "assignments should only be cuddled with other assignments"
+    - path: _test\.go
+      linters:
+        - revive
+      text: "seems to be unused, consider removing or renaming it as _"
     - path: _test\.go
       linters:
         - revive

trm/manager/manager_test.go

@@ -743,9 +743,9 @@ func Test_transactionManager_Do_Cancel(t *testing.T) {
 				WithSettings(tt.fields.settings),
 			)
 
-			err := error(nil)
-			wg := sync.WaitGroup{}
+			var err error
 
+			wg := sync.WaitGroup{}
 			wg.Add(1)
 
 			ctx, cancel := tt.ctx(context.Background())