add comment without author

[d3zn]

Description
author参数设置为空字符串时 ，打开excel提示 “部分内容有问题。是否让我们尽量尝试恢复? ...”
When the author parameter is set to an empty string, opening excel prompts "There is a problem with some content. Let's try to restore it as much as possible? ..." (google translate)

code

f := excelize.NewFile()
sheet := "Sheet1"
_ = f.SetCellStr(sheet, "A1", "value")
f.AddComment(sheet, "A1", fmt.Sprintf(`{"author":"", "text":"%s"}`, "value comment"))
f.SaveAs("test.xlsx")

Output of go version:

1.16.5

Excelize version or commit ID:

2.6.0

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

macOS BigSur 11.5.2  Microsoft Excel for Mac version 16.59 (22031300) Microsoft 365

[d3zn]

Excel comments have a default author: Author: value comment when use fmt.Sprintf(`{"text":"%s"}`, "value comment"), but i dont need
So now,i have to use the author as text

[xuri]

Thanks for your issue. The author will show with bold style in the comments box currently. I'll consider adding support for creating rich text comments later.

[xuri]

I have added support for creating rich text comments. This feature will be released in version 2.7.0, this is a breaking change, now you can add a comment like this:

err := f.AddComment(sheet, excelize.Comment{
    Cell:   "A12",
    Author: "Excelize",
    Text:   "Excelize: This is a comment.",
})

or set rich text in the comment

err := f.AddComment(sheet, excelize.Comment{
    Cell:   "A12",
    Author: "Excelize",
    Runs:   []excelize.RichTextRun{
        {Text: "Excelize: ", Font: &excelize.Font{Bold: true}},
        {Text: "This is a comment."},
    },
})