bash脚本/函数

我正在尝试设置bash函数,以便键入一些参数并创建git pull请求:

gpreq "<title>" "<ticketnumber>" "<release>" "<briefdescription>"

我试过这两种功能都没用:

gpreq () {
    hub pull-request -m "$1\n\n Ticket: https://ticketsystem.net/issues/$2\n Target Release: $3\n Description: $4" ; }

而且

gpreq() {
    STR="${1}"$'\n\n Ticket: https://ticketsystem.net/issues/'$"${2}"$'\n Target Release: '$"${3}"$'\n Description: '$"${4}"
    hub pull-request -m "${STR}" ;
}

由于某些原因,换行符似乎不起作用,而是以实际字符的形式出现。任何帮助都将不胜感激!