fix: default filter not applied for empty array

src/builtin/filters/html.ts

@@ -28,7 +28,7 @@ export function escapeOnce (str: string) {
 }
 
 export function newlineToBr (v: string) {
-  return v.replace(/\n/g, '<br />')
+  return v.replace(/\n/g, '<br/>')
 }
 
 export function stripHtml (v: string) {

src/builtin/filters/object.ts

@@ -1,8 +1,9 @@
 import { isFalsy } from '../../render/boolean'
-import { toValue } from '../../util/underscore'
+import { isArray, isString, toValue } from '../../util/underscore'
 
 export function Default<T1, T2> (v: string | T1, arg: T2): string | T1 | T2 {
-  return isFalsy(toValue(v)) || v === '' ? arg : v
+  if (isArray(v) || isString(v)) return v.length ? v : arg
+  return isFalsy(toValue(v)) ? arg : v
 }
 export function json (v: any) {
   return JSON.stringify(v)