Parentheses in formulas get cut out when inserting new columns or rows

[losdmi]

Description

When adding columns or rows and formulas need to be adjusted, the inner parentheses got cut out therefore resulting in corrupted formula

Steps to reproduce the issue:
Heres example programm

package main

import (
	"fmt"

	"github.com/xuri/excelize/v2"
)

func main() {
	f := excelize.NewFile()
	defer func() {
		if err := f.Close(); err != nil {
			fmt.Println(err)
		}
	}()
	// Create a new sheet.
	index, err := f.NewSheet("Sheet2")
	if err != nil {
		fmt.Println(err)
		return
	}
	// Set value of a cell.
	f.SetCellFormula("Sheet2", "A2", "(1-0.5)/2")
	f.InsertCols("Sheet2", "A", 1)
	// Set active sheet of the workbook.
	f.SetActiveSheet(index)
	// Save spreadsheet by the given path.
	if err := f.SaveAs("Book1.xlsx"); err != nil {
		fmt.Println(err)
	}
}

Describe the results you received:
=1-0,5/2
Describe the results you expected:
=(1-0,5)/2
Output of go version:

go version go1.21.3 darwin/arm64

Excelize version or commit ID:

2.8.1

Environment details (OS, Microsoft Excel™ version, physical, etc.):
MacOS

[xuri]

Thanks for your issue. This bug has been fixed. Please upgrade to the master branch code by go get -u github.com/xuri/excelize/v2@master, and this patch will be released in the next version.