Another use case for __traits(docComment)

[Adam D. Ruppe]

Writing code to wrap some Phobos functions for a script language 
and need documentation to be displayed at runtime...

Would be really nice to just say if(other_docs.length == 0) 
return __traits(docComment, item).

A UDA can populate other_docs in some functions, but when 
wrapping libraries you can't add that. Having the doc comment 
available through reflection means we can reuse these existing 
items.