remove unneccessary code

.circleci/config.yml

@@ -44,12 +44,6 @@ jobs:
       - checkout
       - run: make coverage
       - run: bash <(curl -s https://codecov.io/bash)
-  release:
-    docker:
-      - image: circleci/golang:latest
-    steps:
-      - checkout
-      - run: curl -sL https://git.io/goreleaser | bash
 workflows:
   version: 2
   build_and_test:
@@ -58,10 +52,4 @@ workflows:
       - build-go1_12_9
       - build-go1_13
       - build-go_latest
-      - coverage
-      - release:
-          filters:
-            branches:
-              ignore: /.*/
-            tags:
-              only: /v[0-9]+(\.[0-9]+)*(-.*)*/
+      - coverage

errors.go

@@ -61,14 +61,14 @@
 // considered a part of its stable public interface.
 //
 // With the new standard package error we have two new ways to figure what is the cause of
-// our error.
+// our error:
 //
 //     var target *MyError
 //     if errors.As(err, &target) {
 //            // handle specifically
 //     } else {
 //            // unknown error
-//	   }
+//     }
 //
 // or even with sentinel errors:
 //
@@ -211,13 +211,12 @@ func Wrap(err error, message string) error {
 	if err == nil {
 		return nil
 	}
-	wErr := fmt.Errorf("%w", err)
-	wErr = &withMessage{
+	err = &withMessage{
 		cause: err,
 		msg:   message,
 	}
 	return &withStack{
-		wErr,
+		err,
 		callers(),
 	}
 }
@@ -229,13 +228,12 @@ func Wrapf(err error, format string, args ...interface{}) error {
 	if err == nil {
 		return nil
 	}
-	wErr := fmt.Errorf("%w", err)
-	wErr = &withMessage{
+	err = &withMessage{
 		cause: err,
 		msg:   fmt.Sprintf(format, args...),
 	}
 	return &withStack{
-		wErr,
+		err,
 		callers(),
 	}
 }

errors_test.go

@@ -270,5 +270,4 @@ func TestAs(t *testing.T) {
 	if !As(wrap, &tt) {
 		t.Errorf("Expected that '%v' error and the '%v' error should be of the same type", err, wrap)
 	}
-
-}
+}

xerrors.go

@@ -212,13 +212,12 @@ func Wrap(err error, message string) error {
 	if err == nil {
 		return nil
 	}
-	wErr := xerrors.Errorf("%w", err)
-	wErr = &withMessage{
+	err = &withMessage{
 		cause: err,
 		msg:   message,
 	}
 	return &withStack{
-		wErr,
+		err,
 		callers(),
 	}
 }
@@ -230,13 +229,12 @@ func Wrapf(err error, format string, args ...interface{}) error {
 	if err == nil {
 		return nil
 	}
-	wErr := xerrors.Errorf("%w", err)
-	wErr = &withMessage{
+	err = &withMessage{
 		cause: err,
 		msg:   fmt.Sprintf(format, args...),
 	}
 	return &withStack{
-		wErr,
+		err,
 		callers(),
 	}
 }