[r6rs-discuss] Couple of typos/tweaks in 7.1

[AndrevanTonder]

On Sun, 1 Jul 2007, Ben Goetter wrote:

> R5.96 7.1: "An <import level> is one of the following:
> run
> expand
> (meta <level>)
> where <level> represents an exact integer object."  Since a negative
> phase is meaningless, this should probably specify <level> as an exact
> nonnegative integer object.

See paragraph 7.2:

  "... This combination of levels and phases is why negative levels on
   identifiers can be useful, even though libraries exist only at
   non-negative phases."