Felipe Contreras [off-list ref] writes:
If the goal of the change is to make things more user-friendly, then
I'd say "git diff HEAD @stage" is better than "git diff
--tree-vs-staged HEAD".
Exactly. That is where we disagree. The funny "@stage" does not convey
the fact that it is affecting how "git diff" operates, like any other
option like "-R" does in "git diff -R" command line does. Now the user
needs to know git commands take -option like other normal tools do, but in
addition they need to remember that an oddball "diff" subcommand takes
"@funny" in addition to the usual "-option".
How would that be an improvement?