Fix up incorrect output formatting

ipam/http.go

@@ -204,6 +204,6 @@ func (alloc *Allocator) HandleHTTP(router *mux.Router, defaultSubnet address.CID
 		if alloc.tracker != nil {
 			tracker = alloc.tracker.String()
 		}
-		fmt.Fprintf(w, tracker)
+		fmt.Fprintln(w, tracker)
 	})
 }

test/images/network-tester/webserver.go

@@ -91,7 +91,7 @@ func (s *State) serveClientIP(w http.ResponseWriter, r *http.Request) {
 		w.WriteHeader(http.StatusInternalServerError)
 	}
 
-	fmt.Fprintf(w, host)
+	fmt.Fprintln(w, host)
 }
 
 // serveRead writes our json encoded state