cat-file: don't whitespace-pad "(...)" in SYNOPSIS and usage output

cat-file: don't whitespace-pad "(...)" in SYNOPSIS and usage output

Fix up whitespace issues around "(... | ...)" in the SYNOPSIS and
usage. These were introduced in ab/cat-file series. See
e145efa6059 (Merge branch 'ab/cat-file' into next, 2022-01-05). In
particular 57d6a1cf96, 5a40417876 and 97fe7250753 in that series.

We'll now correctly emit this usage output:

    $ git cat-file -h
    usage: git cat-file <type> <object>
       or: git cat-file (-e | -p) <object>
       or: git cat-file (-t | -s) [--allow-unknown-type] <object>
    [...]

Before this the last line of that would be inconsistent with the
preceding "(-e | -p)":

   or: git cat-file ( -t | -s ) [--allow-unknown-type] <object>

Reported-by: Jiang Xin <worldhello.net@gmail.com>
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Acked-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>