Comment 2 for bug 146314

schnollk, you wanted dpkg -L, not dpkg -S.

dpkg -L lists all files owned by a package; dpkg -S searches packages for owning a file name or a part of a file name -- in this case the only filenames containing "aptitude-doc-en" were /usr/share/doc/aptitude-doc-en/*.

(I just installed aptitude-doc-en earlier tonight, was briefly confused, and then ran dpkg -L and figured out what was going on. So I don't disagree that the location is a bit confusing.)