fix lint in demo

components/checkbox/demo/controller.md

@@ -26,7 +26,8 @@ class App extends React.Component {
     return (
       <div>
         <p style={{ marginBottom: '20px' }}>
-          <Checkbox checked={this.state.checked}
+          <Checkbox
+            checked={this.state.checked}
             disabled={this.state.disabled}
             onChange={this.onChange}
           >

components/date-picker/demo/presetted-ranges.md

@@ -22,6 +22,7 @@ function onChange(dates, dateStrings) {
   console.log('From: ', dates[0], ', to: ', dates[1]);
   console.log('From: ', dateStrings[0], ', to: ', dateStrings[1]);
 }
+
 ReactDOM.render(
   <div>
     <RangePicker

components/table/demo/row-selection-and-operation.md

@@ -75,7 +75,9 @@ class App extends React.Component {
           >
             Reload
           </Button>
-          <span style={{ marginLeft: 8 }}>{hasSelected ? `Selected ${selectedRowKeys.length} items` : ''}</span>
+          <span style={{ marginLeft: 8 }}>
+            {hasSelected ? `Selected ${selectedRowKeys.length} items` : ''}
+          </span>
         </div>
         <Table rowSelection={rowSelection} columns={columns} dataSource={data} />
       </div>

package.json

@@ -109,7 +109,7 @@
     "eslint-plugin-babel": "^4.0.0",
     "eslint-plugin-import": "^2.2.0",
     "eslint-plugin-jsx-a11y": "^5.0.1",
-    "eslint-plugin-markdown": "1.0.0-beta.4",
+    "eslint-plugin-markdown": "~1.0.0-beta.4",
     "eslint-plugin-react": "^7.0.1",
     "eslint-tinker": "^0.4.0",
     "fetch-jsonp": "^1.0.3",