Re: [PATCH v5 1/3] t4001: modernize

> Old tests were written in a different style than modern
> ones; for better readability and test error messages,
> update t4001 to the modern style.
>
> * run everything inside of a test_expect_success block.
> * write title line on the same line as test_expect_success,
>   end that line with a single quote that opens the body of the test,
>   and end the test with a single quote that closes the body.
> * write expected output of a test to a file named "expect",
>   and actual output to a file named "actual".
> * write here-docs using "<<-" syntax, so that they're indented
>   uniformly with the rest of the test.
> * make test names more clearly reflect the functionality that
>   they test.
>
> Signed-off-by: Mark C. Chu-Carroll <markchucarroll@fastmail.com>
> ---
>  t/t4001-diff-rename.sh   | 91 +++++++++++++++++-----------------------
>  t/t4009-diff-rename-4.sh | 54 ++++++++++++------------
>  2 files changed, 66 insertions(+), 79 deletions(-)