Re: [PATCH] t1400-update-ref: set VISUAL=true as well as EDITOR=true

Eric Wong [off-list ref] writes:

I have VISUAL set in my environment, and it caused git-commit to
spawn my editor during the test.

I think it would be better to remove "EDITOR=: VISUAL=:"
settings from annotate-tests.sh, t1400-update-ref.sh and
t4013-diff-various.sh, and move that to test-lib.sh; there is no
point overriding them differently in each of these automated
tests.