Merge branch 'master' into master

gadilashashank · web-flow · commit cc8227574878 · 2018-06-21T12:05:07.000+05:30
diff --git a/book/languages/js/intro.md b/book/languages/js/intro.md
@@ -20,4 +20,4 @@ Some of its variants are also used in creating desktop and mobile native apps (P
  React.js is supposed to mean that they are related to
  JavaScript and not that they are individual files
  written in JavaScript.
-```
+ ```
