This close #1985, fix incorrect result of cell value after apply general number format (#1986)

- Update unit tests

Author: peng

numfmt.go

@@ -5136,7 +5136,10 @@ func (nf *numberFormat) positiveHandler() string {
 	var fmtNum bool
 	for _, token := range nf.section[nf.sectionIdx].Items {
 		if token.TType == nfp.TokenTypeGeneral {
-			return strconv.FormatFloat(nf.number, 'G', 10, 64)
+			if isNum, precision, _ := isNumeric(nf.value); isNum && precision > 11 {
+				return strconv.FormatFloat(nf.number, 'G', 10, 64)
+			}
+			return nf.value
 		}
 		if inStrSlice(supportedNumberTokenTypes, token.TType, true) != -1 {
 			fmtNum = true

numfmt_test.go

@@ -11,6 +11,7 @@ func TestNumFmt(t *testing.T) {
 	for _, item := range [][]string{
 		{"123", "general", "123"},
 		{"-123", ";general", "-123"},
+		{"12345678901", "General", "12345678901"},
 		{"43543.5448726851", "General", "43543.54487"},
 		{"-43543.5448726851", "General", "-43543.54487"},
 		{"1234567890.12345", "General", "1234567890"},