[Rd] Documentation typos (PR#7693)

[Duncan Murdoch]

On Thu, 17 Feb 2005 20:37:36 +0100 (CET), arnima at u.washington.edu
wrote :

>There's a harmless typo in screen.Rd where "coner" should be "corner".
>
>Nitpicking to the extreme, "ie." should be "i.e." in plotformula.Rd and 
>screen.Rd.

I'll fix these in R-devel.  

Duncan Murdoch