show help and recommend when the command is wrong (#3668)
show help and recommend when the command is wrong (#3668)


mingaldrichgan/gatsby,mingaldrichgan/gatsby,fk/gatsby,gatsbyjs/gatsby,0x80/gatsby,danielfarrell/gatsby,fk/gatsby,ChristopherBiscardi/gatsby,danielfarrell/gatsby,ChristopherBiscardi/gatsby,fk/gatsby,gatsbyjs/gatsby,0x80/gatsby,gatsbyjs/gatsby,ChristopherBiscardi/gatsby,mingaldrichgan/gatsby,gatsbyjs/gatsby,danielfarrell/gatsby,gatsbyjs/gatsby,0x80/gatsby,gatsbyjs/gatsby,ChristopherBiscardi/gatsby