[en doc] double quotes in single quote (#1793)

JounQin · posva · commit 32bd7fb9df9f · 2017-10-09T11:08:32.000+02:00
diff --git a/docs/en/essentials/history-mode.md b/docs/en/essentials/history-mode.md
@@ -50,7 +50,7 @@ const httpPort = 80
 http.createServer((req, res) => {
   fs.readFile('index.htm', 'utf-8', (err, content) => {
     if (err) {
-      console.log('We cannot open 'index.htm' file.')
+      console.log('We cannot open "index.htm" file.')
     }
 
     res.writeHead(200, {

Original file line number	Diff line number	Diff line change
`@@ -50,7 +50,7 @@ const httpPort = 80`
`50`	`50`	`http.createServer((req, res) => {`
`51`	`51`	`fs.readFile('index.htm', 'utf-8', (err, content) => {`
`52`	`52`	`if (err) {`
`53`		`- console.log('We cannot open 'index.htm' file.')`
	`53`	`+ console.log('We cannot open "index.htm" file.')`
`54`	`54`	`}`
`55`	`55`
`56`	`56`	`res.writeHead(200, {`