Tests/RunCMake/Syntax/BracketCRLF.cmake - third_party/github.com/Kitware/CMake - Git at Google

 if([[
 ]] STREQUAL "" AND
 [[a
 b]] STREQUAL "a\nb")
   message("CRLF->LF worked")
 else()
   message(FATAL_ERROR "CRLF->LF failed")
 endif()
	if([[
	]] STREQUAL "" AND
	[[a
	b]] STREQUAL "a\nb")
	message("CRLF->LF worked")
	else()
	message(FATAL_ERROR "CRLF->LF failed")
	endif()