Executable haddock titles should include the version

./Cabal/Distribution/Simple/Haddock.hs currently sets
301 argTitle = Flag $ showPkg ++ subtitle
by default but overrides it for executables with
379 argTitle = Flag (exeName exe),
which is distinctly less informative. Any reason not to include the version number (and tags) in the latter string?

Thanks!
--nwf;