Red Hat: argument injection

RunAdHocCommand.build_args() appends limit as bare

positional (args.append(limit)) instead of using

args.extend(['-l', limit]) like RunJob. A limit beginning

with - is parsed as an ansible CLI option. Currently

limited to short-circuit flags (--version, --help) since

injected element displaces required pattern positional.

Would escalate if ansible-core ever defaults pattern.