json: minor comment fix.

I screwed up and didn't write one of the code review changes to disk
before submitting.

TBR=rsc

R=rsc
http://codereview.appspot.com/154122

1 files changed, 1 insertions, 1 deletions

diff --git a/src/pkg/json/struct.go b/src/pkg/json/struct.go
index ab07d9339..4e560ec86 100644
--- a/src/pkg/json/struct.go
+++ b/src/pkg/json/struct.go
@@ -289,7 +289,7 @@ func Unmarshal(s string, val interface{}) (ok bool, errtok string) {
 	v := reflect.NewValue(val);
 	var b *structBuilder;
 
-	// If val is a pointer to a slice, we mutate the pointee.
+	// If val is a pointer to a slice, we append to the slice.
 	if ptr, ok := v.(*reflect.PtrValue); ok {
 		if slice, ok := ptr.Elem().(*reflect.SliceValue); ok {
 			b = &structBuilder{val: slice}