Format code, update documentation and remove exported variable `XMLHeaderByte`

1 files changed, 1 insertions, 1 deletions

diff --git a/rows.go b/rows.go
index ae7e01e..e0918bc 100644
--- a/rows.go
+++ b/rows.go
@@ -179,7 +179,7 @@ type ErrSheetNotExist struct {
 }
 
 func (err ErrSheetNotExist) Error() string {
-	return fmt.Sprintf("sheet %s is not exist", string(err.SheetName))
+	return fmt.Sprintf("sheet %s is not exist", err.SheetName)
 }
 
 // rowXMLIterator defined runtime use field for the worksheet row SAX parser.