updatekeys: Fix argument parsing
@@ -6,7 +6,9 @@ import teuthology.lock.cli
doc = """
usage: teuthology-updatekeys -h
- teuthology-updatekeys [-v] [-t <targets> | -a | <machine> ...]
+ teuthology-updatekeys [-v] -t <targets>
+ teuthology-updatekeys [-v] <machine> ...
+ teuthology-updatekeys [-v] -a
Update any hostkeys that have changed. You can list specific machines to run
on, or use -a to check all of them automatically.
