bug#49217: 'shuf' returns nothing if the low range number is higher by 1 than the high number

[Paul Eggert]

On 6/24/21 4:46 PM, F8ER F8ER wrote:
> For example, `shuf -i 101-100 -n 1` returns nothing with the exit code
> = 0 (unexpected).

Actually, it's the expected behavior. It's the same behavior as 'shuf -n 
1 </dev/null'. The '-n 1' option does not mean "output exactly 1 line"; 
it means "output at most 1 line".