Added failing test for parsing a ? at the start of a value
Added failing test for parsing a ? at the start of a value

bassosimone/yaml-cpp,steinwurf/yaml-cpp,steinwurf/yaml-cpp,bassosimone/yaml-cpp,bassosimone/yaml-cpp,steinwurf/yaml-cpp,bassosimone/yaml-cpp,steinwurf/yaml-cpp