bug#62868: 30.0.50; wrong return value of `split-string-shell-command'

[Eli Zaretskii]

> From: lorniu <lorniu@gmail.com>
> Date: Sat, 15 Apr 2023 22:54:54 +0800
> 
> I often get wrong return value from `split-string-shell-command', for
> example:
> 
>   (split-string-shell-command "ffmpeg -i aaa.flv -ss 3 -vf
>   
> \"fps=10,scale=320:-1:flags=lanczos,split[s0][s1];[s0]palettegen[p];[s1][p]paletteuse\"
>   -loop 0 bbb.gif")
> 
> will return value of:
> 
>   ("[s1][p]paletteuse -loop 0 bbb.gif")
> 
> 
> Is this a bug, or am I using it wrong?

Bug.  It doesn't support quoted semi-colons.