[docs][en] synced all table of contents (#403)

* [docs][en] synced all table of contents

* [docs][en] some typos

Author: Jinjiang

Diff for: docs/en/README.md

@@ -57,6 +57,7 @@
     * [contains](api/wrapper-array/contains.md)
     * [exists](api/wrapper/exists.md)
     * [destroy](api/wrapper-array/destroy.md)
+    * [filter](api/wrapper-array/filter.md)
     * [is](api/wrapper-array/is.md)
     * [isEmpty](api/wrapper-array/isEmpty.md)
     * [isVueInstance](api/wrapper-array/isVueInstance.md)

Diff for: docs/en/api/README.md

@@ -44,6 +44,7 @@
   * [contains](./wrapper-array/contains.md)
   * [exists](./wrapper/exists.md)
   * [destroy](./wrapper-array/destroy.md)
+  * [filter](./wrapper-array/filter.md)
   * [is](./wrapper-array/is.md)
   * [isEmpty](./wrapper-array/isEmpty.md)
   * [isVueInstance](./wrapper-array/isVueInstance.md)

Diff for: docs/en/api/wrapper-array/filter.md

@@ -2,7 +2,7 @@
 
 Filter `WrapperArray` with a predicate function on `Wrapper` objects.
 
-Behavior of this method is similar to [Array.prototype.filter](https://developer.mozilla.org/fr/docs/Web/JavaScript/Reference/Objets_globaux/Array/filter)
+Behavior of this method is similar to [Array.prototype.filter](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/filter).
 
 - **Arguments:**
   - `{function} predicate`
@@ -19,5 +19,5 @@ import { expect } from 'chai'
 import Foo from './Foo.vue'
 
 const wrapper = shallow(Foo)
-const filteredDivArray = wrapper.findAll('div', (w) => !w.hasClass('filtered'))
+const filteredDivArray = wrapper.findAll('div').filter(w => !w.hasClass('filtered'))
 ```

Diff for: docs/en/api/wrapper-array/visible.md

@@ -2,7 +2,7 @@
 
 Assert every `Wrapper` in `WrapperArray` is visible.
 
-Returns false if at least one ancestor element has `display: none` or `visibility: hidden` style.
+Returns `false` if at least one ancestor element has `display: none` or `visibility: hidden` style.
 
 This can be used to assert that a component is hidden by `v-show`.
 

Diff for: docs/en/api/wrapper/visible.md

@@ -2,7 +2,7 @@
 
 Assert `Wrapper` is visible.
 
-Returns false if an ancestor element has `display: none` or `visibility: hidden` style.
+Returns `false` if an ancestor element has `display: none` or `visibility: hidden` style.
 
 This can be used to assert that a component is hidden by `v-show`.