This closes #1219, fixes cell value reading issue, improves performance, and 1904 date system support

- Fix incorrect cell data types casting results when number formatting
- Support set cell value on 1904 date system enabled, ref #1212
- Improve performance for set sheet row and the merging cells, fix performance impact when resolving #1129

1 files changed, 2 insertions, 5 deletions

diff --git a/merge.go b/merge.go
index 376b68b..0f57826 100644
--- a/merge.go
+++ b/merge.go
@@ -11,9 +11,7 @@
 
 package excelize
 
-import (
-	"strings"
-)
+import "strings"
 
 // Rect gets merged cell rectangle coordinates sequence.
 func (mc *xlsxMergeCell) Rect() ([]int, error) {
@@ -70,8 +68,7 @@ func (f *File) MergeCell(sheet, hCell, vCell string) error {
 		ws.MergeCells = &xlsxMergeCells{Cells: []*xlsxMergeCell{{Ref: ref, rect: rect}}}
 	}
 	ws.MergeCells.Count = len(ws.MergeCells.Cells)
-	styleID, _ := f.GetCellStyle(sheet, hCell)
-	return f.SetCellStyle(sheet, hCell, vCell, styleID)
+	return err
 }
 
 // UnmergeCell provides a function to unmerge a given coordinate area.