t9902: fix 'test A == B' to use = operator
t9902: fix 'test A == B' to use = operator

The == operator as an alias to = is not POSIX.  This doesn't actually
matter for the execution of the script, because it only runs when the
shell is bash.  However, it trips up test-lint, so it's nicer to use
the standard form.

Signed-off-by: Thomas Rast <18f23ef7096473d837b7404952f13710423b8b63@inf.ethz.ch>
Signed-off-by: Junio C Hamano <a6723cc3f76163bf7adb636a73ac3b0ceb3e6b9b@pobox.com>

destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git