Only show function name once for grouped functions

[wilzbach]

If I look closer at a method, I already know it's called canFind, so I would just like to see what overload it has:

[adamdruppe]

Let me put a link for this: http://dpldocs.info/experimental-docs/std.algorithm.searching.canFind.html (btw looking at old vs new i kinda like the blue more than the red i use now on links. but oh well)

so it does group names if they are /// ditto but not if they have separate doc comments.

This also happens to be an eponymous template, which adds to some name repetition. I'm not sure how to improve it, so keeping this open too.