Documentation incorrect

[Valentin Shtronda <valiko.ua@…>]

http://www.boost.org/doc/libs/1_51_0/libs/test/doc/html/utf/user-guide/runtime-config/reference.html Select "detect_memory_leak".

1. detect_memory_leak -> detect_memory_leaks
2. build_info -> detect_memory_leaks
3. then -> than
4. produce -> produces
5. In release mode it does not show me memory leaks. Does it work only in debug mode? If yes, I would mention this in description.
6. Since there are several sentences in the description it would look more natural if first sentence started with capital letter.

[Gennadiy Rozental]

Thank you. I've made the changes in trunk to reflect your suggestions.