Re: [PATCH 4/5] test: improve rebase -q test

> A more preferrable alternative may be adding something like this to
> test-lib.sh and call it from here and elsewhere (there are about 50
> places that do "test ! -s <filename>"), perhaps?
>
>         test_must_be_an_empty_file () {
>                 if test -s "$1"
>                 then
>                         cat "$1"
>                         false
>                 fi
>         }