Cleaned up (?) output.

Help screen for Score Manager main menu looks like this:

    Score manager - active scores

        all dirs - metadata module - edit (mdme)           views - apply (va)
        all dirs - metadata module - list (mdmls)          views - clear (vc)
        all dirs - metadata module - rewrite (mdmrw)       views - list (vls)
                                                           views - new (vnew)
        all score packages - fix (fix)                     views - remove (vrm)
                                                           views - rename (vren)
        cache - read only (cro)                            views - view module (vmro)
        cache - write (cw)

        go - back (b)
        go - home (h)
        go - score (s)

        go - next score (>>)
        go - previous score (<<)

        go - build (u)
        go - distribution (d)
        go - makers (k)
        go - materials (m)
        go - segments (g)
        go - stylesheets (y)

        repository - add (rad)
        repository - commit (rci)
        repository - revert (rrv)
        repository - status (rst)
        repository - update (rup)

        scores - copy (cp)
        scores - new (new)
        scores - remove (rm)
        scores - rename (ren)

        scores - show active (ssv)
        scores - show all (ssl)
        scores - show examples (ssx)
        scores - show mothballed (ssmb)
        scores - show user (ssu)

        system - LilyPond log (ll)
        system - Python (pyi)
        system - commands (?)
        system - doctest (pyd)
        system - pytest (pyt)
        system - quit (q)
        system - session variables (sv)
        system - shell (!)

    >