    it "handles Symbol keys with underscore and tailing '='" do
      cl = subject.build_command_line("true", :abc_def= => "ghi")
      expect(cl).to eq "true --abc-def=ghi"
    end
The software constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.