Edit copy in Tutorial Part Three (#2230)
Edit copy in Tutorial Part Three (#2230)

* Edit copy in Tutorial Part Three

* tweak the tweaks

0x80/gatsby,danielfarrell/gatsby,gatsbyjs/gatsby,mingaldrichgan/gatsby,gatsbyjs/gatsby,fk/gatsby,danielfarrell/gatsby,fabrictech/gatsby,ChristopherBiscardi/gatsby,gatsbyjs/gatsby,Khaledgarbaya/gatsby,ChristopherBiscardi/gatsby,fabrictech/gatsby,gatsbyjs/gatsby,gatsbyjs/gatsby,gatsbyjs/gatsby,Khaledgarbaya/gatsby,fk/gatsby,mingaldrichgan/gatsby,mickeyreiss/gatsby,danielfarrell/gatsby,mingaldrichgan/gatsby,mickeyreiss/gatsby,mickeyreiss/gatsby,ChristopherBiscardi/gatsby,0x80/gatsby,fabrictech/gatsby,0x80/gatsby,fk/gatsby,ChristopherBiscardi/gatsby,Khaledgarbaya/gatsby