style: go fmt for all

weed/topology/node.go

@@ -46,8 +46,8 @@ type NodeImpl struct {
 	maxVolumeCount    int64
 	parent            Node
 	sync.RWMutex      // lock children
-	children    map[NodeId]Node
-	maxVolumeId needle.VolumeId
+	children          map[NodeId]Node
+	maxVolumeId       needle.VolumeId
 
 	//for rack, data center, topology
 	nodeType string

weed/topology/topology_test.go

@@ -114,10 +114,10 @@ func TestHandlingVolumeServerHeartbeat(t *testing.T) {
 			nil,
 			dn)
 
-		for vid, _ := range layout.vid2location{
+		for vid, _ := range layout.vid2location {
 			println("after add volume id", vid)
 		}
-		for _, vid := range layout.writables{
+		for _, vid := range layout.writables {
 			println("after add writable volume id", vid)
 		}