If the class name is modified, its name in the description should be too.
However, pluralization is a bit complicated in this case. I'll give the options `RefCounteds` and `reference-counted objects`. Maybe both can be used.
For the time being we don't support writing a description for those, preferring
having all details in the method's description.
Using self-closing tags saves half the lines, and prevents contributors from
thinking that they should write the argument or return documentation there.
