Both variants (from wiki and your are correct) It depends on what structure of /etc/portage you use (or how many stuff you have inside)
man portage says: >/etc/portage/ >Any file in this directory that begins with "package." can be more than just a flat file. If it is a directory, then all the files in that directory ill be sorted in ascending alphabetical order by file name and summed together as if it were a single file. Maksim
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