Tests/RunCMake/ExternalData/BadOption1.cmake - third_party/github.com/Kitware/CMake - Git at Google

 include(ExternalData)
 ExternalData_Add_Test(Data
   NAME Test
   COMMAND ${CMAKE_COMMAND} -E echo DATA{Data.txt,Bad/Option}
   )
	include(ExternalData)
	ExternalData_Add_Test(Data
	NAME Test
	COMMAND ${CMAKE_COMMAND} -E echo DATA{Data.txt,Bad/Option}
	)