move: magic from internal

28-error-handling/04b-named-params/main.go

@@ -11,10 +11,10 @@ import (
 	"fmt"
 	"os"
 
-	"github.com/inancgumus/learngo/internal/magic"
+	"github.com/inancgumus/learngo/magic"
 	//
 	// Use the following one for the panicking library:
-	// magic "github.com/inancgumus/learngo/internal/magicpanic"
+	// magic "github.com/inancgumus/learngo/magicpanic"
 	//
 )
 

magic/detect.go

@@ -9,6 +9,7 @@ package magic
 
 import (
 	"bytes"
+	"errors"
 	"fmt"
 	"io"
 	"os"
@@ -63,7 +64,7 @@ func read(filename string, buf []byte) error {
 	}
 
 	if fi.Size() <= int64(len(buf)) {
-		return fmt.Errorf("file size < len(buf)")
+		return errors.New("file size < len(buf)")
 	}
 
 	_, err = io.ReadFull(file, buf)