gofmt: don't print ()'s around function-typed results (not needed anymore)

- add extra test cases to go/printer tests
- apply gofmt to src and misc

R=rsc
CC=golang-dev
http://codereview.appspot.com/223041

1 files changed, 1 insertions, 1 deletions

diff --git a/src/pkg/exp/iterable/iterable.go b/src/pkg/exp/iterable/iterable.go
index b1ae0e90f..416a70836 100644
--- a/src/pkg/exp/iterable/iterable.go
+++ b/src/pkg/exp/iterable/iterable.go
@@ -18,7 +18,7 @@ type Iterable interface {
 	Iter() <-chan interface{}
 }
 
-func not(f func(interface{}) bool) (func(interface{}) bool) {
+func not(f func(interface{}) bool) func(interface{}) bool {
 	return func(e interface{}) bool { return !f(e) }
 }