[racket-dev] check over this doc fix to slideshow's (dc ...) before I push?

At Sat, 28 Jan 2012 15:13:53 -0500, John Clements wrote:
> The docs for slideshow's (dc ...) call didn't mention the use of the 'a' and 
> 'd' arguments. I inferred based on the following docs that these referred to 
> ascent and descent, and assumed based on the following docs that these were 
> added to the height passed to the procedure.  Let me know if I should/shouldn't 
> push the commit below:

Thanks! The correction isn't quite right (because ascent equals height in
the three-argument case, and height is not computed from ascent and
descent in the five-argument case), but I'll fix and push it.