[PR] Fix unintended errors in examples.
[PR] Fix unintended errors in examples.

Summary: Closes https://github.com/facebook/flow/pull/4373

Differential Revision: D5498699

Pulled By: jbrown215

fbshipit-source-id: 45a64eac5834c6741bd16fb965288ac80e934659

claudiopro/flow,facebook/flow,AgentME/flow,AgentME/flow,gabelevi/flow,popham/flow,popham/flow,claudiopro/flow,samwgoldman/flow,popham/flow,mroch/flow,mroch/flow,claudiopro/flow,MichaelDeBoey/flow,jamesgpearce/flow,facebook/flow,mroch/flow,samwgoldman/flow,MichaelDeBoey/flow,mroch/flow,samwgoldman/flow,facebook/flow,JonathanUsername/flow,samwgoldman/flow,nmote/flow,ylu1317/flow,AgentME/flow,samwgoldman/flow,ylu1317/flow,AgentME/flow,MichaelDeBoey/flow,ylu1317/flow,gabelevi/flow,nmote/flow,jamesgpearce/flow,gabelevi/flow,JonathanUsername/flow,popham/flow,facebook/flow,claudiopro/flow,gabelevi/flow,nmote/flow,jamesgpearce/flow,TiddoLangerak/flow,gabelevi/flow,nmote/flow,mroch/flow,popham/flow,popham/flow,TiddoLangerak/flow,jamesgpearce/flow,ylu1317/flow,jamesgpearce/flow,nmote/flow,JonathanUsername/flow,JonathanUsername/flow,mroch/flow,JonathanUsername/flow,ylu1317/flow,JonathanUsername/flow,nmote/flow,samwgoldman/flow,gabelevi/flow,TiddoLangerak/flow,TiddoLangerak/flow,facebook/flow,mroch/flow,samwgoldman/flow,facebook/flow,claudiopro/flow,JonathanUsername/flow,TiddoLangerak/flow,MichaelDeBoey/flow,jamesgpearce/flow,MichaelDeBoey/flow,jamesgpearce/flow,nmote/flow,AgentME/flow,popham/flow,gabelevi/flow,facebook/flow