reflect: doc fixes for obsolete types.

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/4802061
diff --git a/src/pkg/reflect/all_test.go b/src/pkg/reflect/all_test.go
index ac43b50..15c69c1 100644
--- a/src/pkg/reflect/all_test.go
+++ b/src/pkg/reflect/all_test.go
@@ -1327,8 +1327,8 @@
 	}
 }
 
-func TestDotDotDot(t *testing.T) {
-	// Test example from FuncType.DotDotDot documentation.
+func TestVariadic(t *testing.T) {
+	// Test example from Type documentation.
 	var f func(x int, y ...float64)
 	typ := TypeOf(f)
 	if typ.NumIn() == 2 && typ.In(0) == TypeOf(int(0)) {