svnbackport --version (return code: 0)
Usage: svnbackport [-b <branch>] [-r <revision number>] <file> [<file> ...]
default branch is 4.9
svnbackport --help (return code: 0)
Usage: svnbackport [-b <branch>] [-r <revision number>] <file> [<file> ...]
default branch is 4.9