This closes #849, add new function `DeleteComment` for delete comment (#1317)

- Update unit tests for the delete comment
- Add 3 errors function for error messages

1 files changed, 1 insertions, 1 deletions

diff --git a/stream.go b/stream.go
index 91ae78a..3c05c32 100644
--- a/stream.go
+++ b/stream.go
@@ -92,7 +92,7 @@ type StreamWriter struct {
 func (f *File) NewStreamWriter(sheet string) (*StreamWriter, error) {
 	sheetID := f.getSheetID(sheet)
 	if sheetID == -1 {
-		return nil, fmt.Errorf("sheet %s is not exist", sheet)
+		return nil, newNoExistSheetError(sheet)
 	}
 	sw := &StreamWriter{
 		File:    f,