message: Fix CMake include path
  Fix CMake include path
diff: @@ -47,7 +47,7 @@ endif()
  set(generated_dir "${CMAKE_CURRENT_BINARY_DIR}/generated")
  -set(include_install_dir "include/doctest/")
  +set(include_install_dir "include")
  set(config_install_dir "lib/cmake/${PROJECT_NAME}")
  set(version_config "${generated_dir}/${PROJECT_NAME}ConfigVersion.cmake")
  @@ -71,7 +71,7 @@ if (NOT ${DOCTEST_NO_INSTALL})
  install(
  FILES "doctest/doctest.h"
  - DESTINATION "${include_install_dir}"
  + DESTINATION "${include_install_dir}/doctest"
  )
  install(
  