Does sort handle -t / correctly

[Peng Yu]

Hi, I got the following results when I call sort with -t /. It seems
that 'a/1.txt' should be right after 'a'. Is it the case? Or I am not
using sort correctly?

$ printf '%s\n' a 'a!' ab aB a/1.txt | sort -t / -k 1 -k 2 -k 3 -k 4
a
a!
a/1.txt
aB
ab

-- 
Regards,
Peng