🐛 bug(translate): fix underscore named argument translate issue

Author: kazupon

src/format.js

@@ -4,7 +4,7 @@
  *    https://github.com/Matt-Esch/string-template/index.js
  */
 
-const RE_NARGS = /(%|)\{([0-9a-zA-Z]+)\}/g
+const RE_NARGS = /(%|)\{([0-9a-zA-Z_]+)\}/g
 
 
 /**

test/specs/fixture/locales.js

@@ -10,7 +10,8 @@ export default {
     },
     'hello world': 'Hello World',
     'Hello {0}': 'Hello {0}',
-    'continue-with-new-account': 'continue with new account'
+    'continue-with-new-account': 'continue with new account',
+    underscore: '{hello_msg} world'
   },
   ja: {
     message: {

test/specs/issues.js

@@ -5,14 +5,20 @@ import locales from './fixture/locales'
 
 describe('issues', () => {
   let vm
+  beforeEach(() => {
+    vm = new Vue()
+  })
+
 
   describe('#24', () => {
-    beforeEach(() => {
-      vm = new Vue()
+    it('should be translated', () => {
+      assert(vm.$t('continue-with-new-account') === locales[Vue.config.lang]['continue-with-new-account'])
     })
+  })
 
+  describe('#35', () => {
     it('should be translated', () => {
-      assert(vm.$t('continue-with-new-account') === locales[Vue.config.lang]['continue-with-new-account'])
+      assert(vm.$t('underscore', { hello_msg: 'hello' }) === 'hello world')
     })
   })
 })