revisions.txt: mark optional rev arguments with []
commitd86d207471e3411ceb2969f1066e31fb4ca144dc
authorDenton Liu <liu.denton@gmail.com>
Sun, 5 May 2019 16:07:03 +0000 (5 12:07 -0400)
committerJunio C Hamano <gitster@pobox.com>
Tue, 7 May 2019 15:09:06 +0000 (8 00:09 +0900)
tree6229a0043fb01b9f41d7735d06a7385e6b469dcf
parente277ff43d34af1f9f5fbbde92307737f85afaa56
revisions.txt: mark optional rev arguments with []

In revisions.txt, an optional rev argument was not distinguised.
Instead, a user had to continue and read the description in order to
learn that the argument was optional.

Since the [] notation for an optional argument is common-knowledge in
the Git documentation, mark optional arguments with [] so that it's more
obvious for the reader.

Helped-by: Andreas Heiduk <asheiduk@gmail.com>
Signed-off-by: Denton Liu <liu.denton@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Documentation/revisions.txt