9db3aa9 introduced the -r/--max-retries option, but passed `'r'` to
`argparse.ArgumentParser.add_argument` instead of `'-r'` which causes:
Traceback (most recent call last):
File "<string>", line 1, in <module>
File ".../whipper/command/main.py", line 48, in main
cmd = Whipper(sys.argv[1:], os.path.basename(sys.argv[0]), None)
File ".../whipper/command/basecommand.py", line 117, in __init__
self.options
File ".../whipper/command/basecommand.py", line 117, in __init__
self.options
File ".../whipper/command/basecommand.py", line 60, in __init__
self.add_arguments()
File ".../whipper/command/cd.py", line 308, in add_arguments
default=DEFAULT_MAX_RETRIES)
File "/usr/lib/python3.7/argparse.py", line 1354, in add_argument
kwargs = self._get_optional_kwargs(*args, **kwargs)
File "/usr/lib/python3.7/argparse.py", line 1485, in _get_optional_kwargs
raise ValueError(msg % args)
ValueError: invalid option string 'r': must start with a character '-'
for any arguments passed to `whipper cd rip`.
Signed-off-by: Kevin Locke <kevin@kevinlocke.name>
922389687a