rebase: refuse to switch to a branch already checked out elsewhere (test)
In
b5cabb4a9 (rebase: refuse to switch to branch already checked out
elsewhere, 2020-02-23) we add a condition to prevent a rebase operation
involving a switch to a branch that is already checked out in another
worktree.
A bug has recently been fixed that caused this to not work as expected.
Let's add a test to notice if this changes in the future.
Signed-off-by: Rubén Justo <rjusto@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>