update for consistent js style
update for consistent js style

webskyer/nodejsbook.io.examples,AlexGach/nodebook,shapeshed/nodejsbook.io.examples,nuriozalp/nodejs,tim-qian/nodejsbook.io.examples,shapeshed/nodejsbook.io.examples,nuriozalp/nodejs,xkris6x/nodejsbook.io.examples,AlexGach/nodebook,webskyer/nodejsbook.io.examples,xkris6x/nodejsbook.io.examples,tim-qian/nodejsbook.io.examples,shapeshed/nodejsbook.io.examples