Utilities/Sphinx: Ignore warning in generated texinfo documentation

Utilities/Sphinx/CMakeLists.txt

@@ -9,6 +9,7 @@ if(NOT CMake_SOURCE_DIR)
   include(${CMake_SOURCE_DIR}/Modules/CTestUseLaunchers.cmake)
   include(${CMake_SOURCE_DIR}/Source/CMakeVersion.cmake)
   include(${CMake_SOURCE_DIR}/Source/CMakeInstallDestinations.cmake)
+  configure_file(${CMAKE_CURRENT_SOURCE_DIR}/CTestCustom.cmake.in ${CMAKE_CURRENT_BINARY_DIR}/CTestCustom.cmake @ONLY)
   unset(CMAKE_DATA_DIR)
   unset(CMAKE_DATA_DIR CACHE)
   macro(CMake_OPTIONAL_COMPONENT)

Utilities/Sphinx/CTestCustom.cmake.in

@@ -0,0 +1,3 @@
+list(APPEND CTEST_CUSTOM_WARNING_EXCEPTION
+  "cmake.texi:[0-9]+: warning: .definfoenclose is obsolete"
+  )