Re: Some documentation issues

>>> - In Learning Manual > 5.4.2 Within-staff objects > The direction
>>>   property, in the list of predefined \objectDown \objectUp
>>>   \objectNeutral commands, every command in the “Revert” column is
>>>   \*Neutral, except for the command for arpeggio arrows, which is
>>>   \arpeggioNormal. Please change it to \arpeggioArrowNeutral to
>>>   match every other command.
> 
>> Well, `\arpeggioArrowNeutral` doesn't make any sense!  There are no
>> arrows in the 'neutral' case.
> 
>>>   Additionally, it might be best to change the \arpeggioArrowDown
>>>   and \arpeggioArrowUp commands to simply \arpeggioDown and
>>>   \arpeggioUp respectively, in which case the reverting command
>>>   should become \arpeggioNeutral to match them
> 
>> Carl Sorensen has changed this from `\arpeggioDown` to
>> `\arpeggioArrowDown`, in version 2.11.51 (from 2008).  Carl, do you
>> remember why you did that?  I would't object if this was renamed
>> back to `\arpeggioDown` for consistency...
> 
> I would suggest to keep these. These commands are conceptually not
> the same as other Up|Down commands - the \arpeggioArrow* commands
> don't change the position or direction of the grob but rather *add*
> an arrow (pointing up or down). Likewise the \arpeggioNormal command
> does not restore an "automatic" direction, but rather restores a
> normal, un-arrowed arpeggio.

Souds convincing.  I'm going to remove the arpeggio commands from this
table; see

  https://gitlab.com/lilypond/lilypond/-/merge_requests/2741


     Werner