Tests sometimes fail due to ID starting with hyphen

[Ninjani]

When a hypothesis ID starts with a hyphen ('-') then the CLI tests fail because it tries to parse it as an argument. Can't seem to figure out how to escape with quotes with assert_cmd to fix this. In the actual CLI escaping with quotes fixes this issue.

[jonassmedegaard]

not sure if that helps here, but commonly among unix command-line tools, the special option -- (dash-dash) stops parsing any further options, and thus functions as a delimiter between options and non-option arguments.