When and expectation fails and the parameters method is called to display the options and arguments an exception is raised when attempting to merge hashes with a `+` operator.
https://github.com/puppetlabs/bolt/blob/de5fbd26dcf0be04e8e6c31e71f4201bb8027cf8/lib/bolt_spec/plans/action_stubs/task_stub.rb#L33
https://github.com/puppetlabs/bolt/blob/de5fbd26dcf0be04e8e6c31e71f4201bb8027cf8/lib/bolt_spec/plans/action_stubs.rb#L58
bug fix added.