fixes to spec.  mostly minor but several of significance. - carriage return is white space - "" strings cannot span newlines - f(g()) is ok if g is multivalue and matches f's args
fixes to spec.  mostly minor but several of significance.
- carriage return is white space
- "" strings cannot span newlines
- f(g()) is ok if g is multivalue and matches f's args

R=rsc, gri
CC=go-dev
http://go/go-review/1024017
abustany/go,abustany/go,abustany/go,abustany/go,abustany/go,abustany/go,abustany/go