Here I'm testing only the slashme module. This assert assures it's independant from linkify or it's not make anything else that it should do.

As I said, in a first time I tried to implement this inside the linkify and tried to make it recursive. Instead, I saw I would rather redo all the parsing logic to make the /me funcionality with links parsing. The link parsing doesn't allow to create link tags inside other link tags, and that is something sensible to break.