refactor: by ESLint

browser/components/MarkdownEditor.js

@@ -157,7 +157,7 @@ class MarkdownEditor extends React.Component {
     this.renderPreview(this.props.value)
   }
 
-  handleKeyDown(e) {
+  handleKeyDown (e) {
     const keyPressed = Object.assign(this.state.keyPressed, {
       [e.key]: true
     })

browser/components/MarkdownPreview.js

@@ -152,7 +152,7 @@ export default class MarkdownPreview extends React.Component {
   exportAsDocument (fileType) {
     const options = {
       filters: [
-        { name: 'Documents', extensions: [fileType]}
+        { name: 'Documents', extensions: [fileType] }
       ],
       properties: ['openFile', 'createDirectory']
     }
@@ -329,7 +329,7 @@ export default class MarkdownPreview extends React.Component {
     }
   }
 
-  preventImageDroppedHandler(e) {
+  preventImageDroppedHandler (e) {
     e.preventDefault()
     e.stopPropagation()
   }