Re: [PATCH 1/4] t4041 (diff-submodule-option): parse digests sensibly

> `git rev-list --max-count=1 HEAD` is a roundabout way of saying `git
> rev-parse --verify HEAD`; replace a bunch of instances of the former
> with the latter.  Also, don't unnecessarily `cut -c1-7` the rev-parse
> output when the `--short` option is available.
>
> Signed-off-by: Ramkumar Ramachandra <artagnon@gmail.com>
> ---
>  t/t4041-diff-submodule-option.sh |   14 +++++++-------
>  1 files changed, 7 insertions(+), 7 deletions(-)
>
> diff --git a/t/t4041-diff-submodule-option.sh b/t/t4041-diff-submodule-option.sh
> index 5377639..cfb71e5 100755
> --- a/t/t4041-diff-submodule-option.sh
> +++ b/t/t4041-diff-submodule-option.sh
> @@ -21,7 +21,7 @@ add_file () {
>  		test_tick &&
>  		git commit -m "Add $name"
>  	done >/dev/null
> -	git rev-parse --verify HEAD | cut -c1-7
> +	git rev-parse --short --verify HEAD
>  	cd "$owd"
>  }
>  commit_file () {
> @@ -33,7 +33,7 @@ test_create_repo sm1 &&
>  add_file . foo >/dev/null
>  
>  head1=$(add_file sm1 foo1 foo2)
> -fullhead1=$(cd sm1; git rev-list --max-count=1 $head1)
> +fullhead1=$(cd sm1; git rev-parse --verify $head1)

>  test_expect_success 'added submodule' "
>  	git add sm1 &&
> @@ -116,8 +116,8 @@ EOF
>  	test_cmp expected actual
>  "
>  
> -fullhead2=$(cd sm1; git rev-list --max-count=1 $head2)
>  test_expect_success 'modified submodule(forward) --submodule=short' "
> +fullhead2=$(cd sm1; git rev-parse --verify $head2)
>  	git diff --submodule=short >actual &&
>  	cat >expected <<-EOF &&
>  diff --git a/sm1 b/sm1
> @@ -135,7 +135,7 @@ commit_file sm1 &&
>  head3=$(
>  	cd sm1 &&
>  	git reset --hard HEAD~2 >/dev/null &&
> -	git rev-parse --verify HEAD | cut -c1-7
> +	git rev-parse --short --verify HEAD
>  )
>  
>  test_expect_success 'modified submodule(backward)' "
> @@ -220,8 +220,8 @@ EOF
>  rm -f sm1 &&
>  test_create_repo sm1 &&
>  head6=$(add_file sm1 foo6 foo7)
> -fullhead6=$(cd sm1; git rev-list --max-count=1 $head6)
>  test_expect_success 'nonexistent commit' "
> +fullhead6=$(cd sm1; git rev-parse --verify $head6)
>  	git diff-index -p --submodule=log HEAD >actual &&
>  	cat >expected <<-EOF &&
>  Submodule sm1 $head4...$head6 (commits not present)
> @@ -318,8 +318,8 @@ EOF
>  "
>  
>  (cd sm1; git commit -mchange foo6 >/dev/null) &&
> -head8=$(cd sm1; git rev-parse --verify HEAD | cut -c1-7) &&
>  test_expect_success 'submodule is modified' "
> +head8=$(cd sm1; git rev-parse --short --verify HEAD) &&
>  	git diff-index -p --submodule=log HEAD >actual &&
>  	cat >expected <<-EOF &&
>  Submodule sm1 $head6..$head8:
> @@ -461,7 +461,7 @@ EOF
>  	test_cmp expected actual
>  "
>  
> -fullhead7=$(cd sm2; git rev-list --max-count=1 $head7)
> +fullhead7=$(cd sm2; git rev-parse --verify $head7)
>  
>  test_expect_success 'given commit --submodule=short' "
>  	git diff-index -p --submodule=short HEAD^ >actual &&