two notes of the same pitch

[Joe Neeman]

There seem to be problems writing music with two notes of the same
pitch:

<c cis>
produces output that looks like <cis cis> (ie there is no natural on the
c)

<c! cis>
results in an accidental collision. The sharp and the natural are
superimposed

<ces c! cis>
results in all three accidentals superimposed and only two noteheads.
There aren't too many examples of this sort of thing in music, but I
have seen things like this typeset by splitting the stem like so:
  |
 / \
xx x

with, for example, ces and c on the left stem and cis on the right. I
have an example of this in something by Shostakovich, but I don't have
the music here with me right now so I can't say for sure what it is.

This is with this morning's CVS.

Cheers,
Joe