Fixed #764, add a condition for round precision

cell_test.go

@@ -124,8 +124,9 @@ func TestSetCellValues(t *testing.T) {
 	err = f.SetCellValue("Sheet1", "A1", time.Date(1600, time.December, 31, 0, 0, 0, 0, time.UTC))
 	assert.NoError(t, err)
 
-	_, err = f.GetCellValue("Sheet1", "A1")
-	assert.EqualError(t, err, `strconv.ParseFloat: parsing "1600-12-31T00:00:00Z": invalid syntax`)
+	v, err = f.GetCellValue("Sheet1", "A1")
+	assert.NoError(t, err)
+	assert.Equal(t, v, "1600-12-31T00:00:00Z")
 }
 
 func TestSetCellBool(t *testing.T) {

rows.go

@@ -20,6 +20,7 @@ import (
 	"log"
 	"math"
 	"strconv"
+	"strings"
 
 	"github.com/mohae/deepcopy"
 )
@@ -345,7 +346,8 @@ func (c *xlsxC) getValueFrom(f *File, d *xlsxSST) (string, error) {
 		}
 		return f.formattedValue(c.S, c.V), nil
 	default:
-		if len(c.V) > 16 {
+		splited := strings.Split(c.V, ".")
+		if len(splited) == 2 && len(splited[1]) > 15 {
 			val, err := roundPrecision(c.V)
 			if err != nil {
 				return "", err

sheet.go

@@ -1137,7 +1137,7 @@ type PageLayoutOptionPtr interface {
 type (
 	// BlackAndWhite specified print black and white.
 	BlackAndWhite bool
-	// FirstPageNumber specified first printed page number. If no value is
+	// FirstPageNumber specified the first printed page number. If no value is
 	// specified, then 'automatic' is assumed.
 	FirstPageNumber uint
 	// PageLayoutOrientation defines the orientation of page layout for a
@@ -1145,9 +1145,9 @@ type (
 	PageLayoutOrientation string
 	// PageLayoutPaperSize defines the paper size of the worksheet.
 	PageLayoutPaperSize int
-	// FitToHeight specified number of vertical pages to fit on.
+	// FitToHeight specified the number of vertical pages to fit on.
 	FitToHeight int
-	// FitToWidth specified number of horizontal pages to fit on.
+	// FitToWidth specified the number of horizontal pages to fit on.
 	FitToWidth int
 	// PageLayoutScale defines the print scaling. This attribute is restricted
 	// to values ranging from 10 (10%) to 400 (400%). This setting is