gofumpt removes multiple tag_name:"..." tags, only first is left

[sk-lemken]

In my application I'm using the flags package.
It has the possiblity to specify the allowed values for a paramter via choice:"..." in the struct tags.

The issue here is, when multiple tags with the same name exist, all but the first are removed.

Expected:

Format is done but tags are left in place.

type CLI struct {
    ParamLevel string `short:"L" long:"level" choice:"info" choice:"warn" choice:"error" ... description:"..."
}

Actual

type CLI struct {
    ParamLevel string `short:"L" long:"level" choice:"info" ... description:"..."
}

Format is done but same name tags are removed and only first occurence is left.