docs(zh): change line to lines in plugin-dev.md (#5671)

zhouxinyong · zhouxinyong[周新勇] · web-flow · commit e5cf1a2e3766 · 2020-07-11T12:31:43.000+08:00
Co-authored-by: zhouxinyong[周新勇] &lt;zhouxinyong@xiaomi.com&gt;
diff --git a/docs/zh/dev-guide/plugin-dev.md b/docs/zh/dev-guide/plugin-dev.md
@@ -288,7 +288,7 @@ module.exports.hooks = (api) => {
     const renderIndex = lines.findIndex(line => line.match(/render/))
     lines[renderIndex] += `${EOL}  router,`
 
-    fs.writeFileSync(api.entryFile, line.join(EOL), { encoding: 'utf-8' })
+    fs.writeFileSync(api.entryFile, lines.join(EOL), { encoding: 'utf-8' })
   })
 }
 ```

Original file line number	Diff line number	Diff line change
`@@ -288,7 +288,7 @@ module.exports.hooks = (api) => {`
`288`	`288`	`const renderIndex = lines.findIndex(line => line.match(/render/))`
`289`	`289`	lines[renderIndex] += `${EOL} router,`
`290`	`290`
`291`		`- fs.writeFileSync(api.entryFile, line.join(EOL), { encoding: 'utf-8' })`
	`291`	`+ fs.writeFileSync(api.entryFile, lines.join(EOL), { encoding: 'utf-8' })`
`292`	`292`	`})`
`293`	`293`	`}`
`294`	`294`	```