Doc++

doc/namespaces.dox

@@ -273,8 +273,8 @@ target_link_libraries(your-app PRIVATE Magnum::Audio)
 Additionally, if you're using Magnum as a CMake subproject, do the following
 * *before* calling @cmake find_package() @ce to ensure it's enabled, as the
 library is not built by default. Using OpenAL itself as a CMake subproject
-isn't isn't tested at the moment, so you need to provide it as a system
+isn't  tested at the moment, so you need to provide it as a system dependency
-dependency and point `CMAKE_PREFIX_PATH` to its installation dir if necessary.
+and point `CMAKE_PREFIX_PATH` to its installation dir if necessary.
 
 @code{.cmake}
 set(WITH_AUDIO ON CACHE BOOL "" FORCE)