- 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/cmd/cgo/main.go

@@ -16,9 +16,7 @@ import (
 	"os";
 )
 
-func usage() {
-	fmt.Fprint(os.Stderr, "usage: cgo [compiler options] file.go\n");
-}
+func usage()	{ fmt.Fprint(os.Stderr, "usage: cgo [compiler options] file.go\n") }
 
 var ptrSizeMap = map[string]int64{
 	"386": 4,