Junio C Hamano wrote:
If you accept only "@" but not "master@", that behaviour needs a
wrong world model to understand and justify (one of which is "@ is a
synonym for HEAD"). If your rule is "In $anything@{$n}, you can
drop {$n} when $n==0", then HEAD@{0} becomes HEAD@ and master@{0}
becomes master@, and @{0} becomes @ naturally.
You're telling me how to get @ from @{0}, but not how to get @ from
HEAD. @{0}@{4} is meaningless, but HEAD@{4} is meaningful.