@ is SVN's identifier for PEG revisions. But SVN's treatment of PEG
identifiers in copy target URLs changed in r954995/r952973, i.e. between
1.6.11 and 1.6.12. They get eaten now (which is considered the right
way).
Therefore, avoid the @ in the tests with funky branch names.
Signed-off-by: Michael J Gruber <git@drmicha.warpmail.net> Acked-by: Eric Wong <normalperson@yhbt.net>