Modernize the quoting and indentation style of two tests added in 8685da4256 ("don't ever allow SHA1 collisions to exist by fetching a
pack", 2007-03-20), and of a subsequent one added in 4614043c8f ("index-pack: use streaming interface for collision test on
large blobs", 2012-05-24) which had copied the style of the first two.
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>