This closes #1379, cleanup stream writer temporary files by the `Close` function

- Fix error on inserting columns or rows on the worksheet which contains one cell merged cell range
- Fix getting incomplete rich text cell value in some cases
- Unit tests updated

1 files changed, 10 insertions, 10 deletions

diff --git a/cell.go b/cell.go
index 6ed7f48..fbc84b7 100644
--- a/cell.go
+++ b/cell.go
@@ -152,19 +152,19 @@ func (f *File) SetCellValue(sheet, cell string, value interface{}) error {
 
 // String extracts characters from a string item.
 func (x xlsxSI) String() string {
-	if len(x.R) > 0 {
-		var rows strings.Builder
-		for _, s := range x.R {
-			if s.T != nil {
-				rows.WriteString(s.T.Val)
-			}
+	var value strings.Builder
+	if x.T != nil {
+		value.WriteString(x.T.Val)
+	}
+	for _, s := range x.R {
+		if s.T != nil {
+			value.WriteString(s.T.Val)
 		}
-		return bstrUnmarshal(rows.String())
 	}
-	if x.T != nil {
-		return bstrUnmarshal(x.T.Val)
+	if value.Len() == 0 {
+		return ""
 	}
-	return ""
+	return bstrUnmarshal(value.String())
 }
 
 // hasValue determine if cell non-blank value.