- fine-tuning of one-line func heuristic (nodes.go)

- enabled for function declarations (not just function literals)
- applied gofmt -w $GOROOT/src
(look for instance at src/pkg/debug/elf/elf.go)

R=r, rsc
CC=go-dev
http://go/go-review/1026006

src/pkg/math/bits.go

@@ -25,9 +25,7 @@ func Inf(sign int) float64 {
 }
 
 // NaN returns an IEEE 754 ``not-a-number'' value.
-func NaN() float64 {
-	return Float64frombits(uvnan);
-}
+func NaN() float64	{ return Float64frombits(uvnan) }
 
 // IsNaN returns whether f is an IEEE 754 ``not-a-number'' value.
 func IsNaN(f float64) (is bool) {