[Rd] Typos in language manual

[Duncan Murdoch]

In section "3.4.4 Subset assignment", the manual says this:

> Complex assignments in the enclosing environment (using <<-) are also permitted:
> 
> names(x)[3] <<- "Three"
> is equivalent to
> 
> `*tmp*` <<- get(x, envir=parent.env(), inherits=TRUE)
> names(`*tmp*`)[3] <- "Three"
> x <<- `*tmp*`
> rm(`*tmp*`)

I think there are two typos here in the first line.  I'm pretty sure 
that it should read

     `*tmp*` <- get("x", envir=parent.env(), inherits=TRUE)

i.e. regular assignment, and quoted variable name.

Duncan Murdoch