Create turndown service & use gfm turndown plugin

browser/components/CodeEditor.js

@@ -21,7 +21,7 @@ const { ipcRenderer, remote, clipboard } = require('electron')
 import normalizeEditorFontFamily from 'browser/lib/normalizeEditorFontFamily'
 const spellcheck = require('browser/lib/spellcheck')
 const buildEditorContextMenu = require('browser/lib/contextMenuBuilder')
-import TurndownService from 'turndown'
+import { createTurndownService } from '../lib/turndown'
 import {languageMaps} from '../lib/CMLanguageList'
 import snippetManager from '../lib/SnippetManager'
 import {generateInEditor, tocExistsInEditor} from 'browser/lib/markdown-toc-generator'
@@ -102,7 +102,7 @@ export default class CodeEditor extends React.Component {
 
     this.editorActivityHandler = () => this.handleEditorActivity()
 
-    this.turndownService = new TurndownService()
+    this.turndownService = createTurndownService()
   }
 
   handleSearch (msg) {

browser/lib/turndown.js

@@ -0,0 +1,8 @@
+const TurndownService = require('turndown')
+const { gfm } = require('turndown-plugin-gfm')
+
+export const createTurndownService = function () {
+  const turndown = new TurndownService()
+  turndown.use(gfm)
+  return turndown
+}

browser/main/lib/dataApi/createNoteFromUrl.js

@@ -1,6 +1,6 @@
 const http = require('http')
 const https = require('https')
-const TurndownService = require('turndown')
+const { createTurndownService } = require('../../../lib/turndown')
 const createNote = require('./createNote')
 
 import { push } from 'connected-react-router'
@@ -16,7 +16,7 @@ function validateUrl (str) {
 
 function createNoteFromUrl (url, storage, folder, dispatch = null, location = null) {
   return new Promise((resolve, reject) => {
-    const td = new TurndownService()
+    const td = createTurndownService()
 
     if (!validateUrl(url)) {
       reject({result: false, error: 'Please check your URL is in correct format. (Example, https://www.google.com)'})