bug#66390: `man' allows to inject arbitrary shell code

[Max Nikulin]

On 09/10/2023 23:30, lux wrote:
> Here's my patch and the test cases.

Thank you for your attempt to fix the issue. Unfortunately the proposed 
patch breaks the following case

   M-x man RET -k man RET

That is why I wrote that each word should escaped independently.

I am unsure if (man "-k man") should be supported as call with argument.