module ActionController::Redirecting

of the first positional argument.
Soft deprecated alias for #redirect_back_or_to where the +fallback_location+ location is supplied as a keyword argument instead

def redirect_back(fallback_location:, allow_other_host: _allow_other_host, **args)
  redirect_back_or_to fallback_location, allow_other_host: allow_other_host, **args
end