JS Style Guide: Fix full file closures

[scottgonzalez]

No description provided.

[jzaefferer]

👍

Could use the opportunity to add an example for node, e.g. a Gruntfile.js, something like this:

var path = require( "path" );

module.exports = function( grunt ) {

grunt.registerTask( "custom task", function() {
    // task impl
} );

};

[scottgonzalez]

Added.

[jzaefferer]

Missing js language instruction

[arthurvr]

Looking good 👍

[jzaefferer]

Also missing closing backticks, messing up the highlighting of the remaining file...

[jzaefferer]

Good to land.