[PR] docs(utilities.md): actualize table of content, fix broken markup
[PR] docs(utilities.md): actualize table of content, fix broken markup

Summary: Pull Request resolved: https://github.com/facebook/flow/pull/6707

Reviewed By: pakoito

Differential Revision: D9338668

Pulled By: mrkev

fbshipit-source-id: e05d7e13561c15398e186fe49a1864f8b46c5ada

mroch/flow,AgentME/flow,samwgoldman/flow,facebook/flow,JonathanUsername/flow,samwgoldman/flow,jamesgpearce/flow,mroch/flow,facebook/flow,AgentME/flow,nmote/flow,JonathanUsername/flow,gabelevi/flow,mroch/flow,mroch/flow,nmote/flow,facebook/flow,popham/flow,samwgoldman/flow,AgentME/flow,jamesgpearce/flow,popham/flow,gabelevi/flow,facebook/flow,nmote/flow,samwgoldman/flow,facebook/flow,gabelevi/flow,JonathanUsername/flow,JonathanUsername/flow,samwgoldman/flow,JonathanUsername/flow,popham/flow,gabelevi/flow,samwgoldman/flow,popham/flow,jamesgpearce/flow,AgentME/flow,gabelevi/flow,facebook/flow,jamesgpearce/flow,mroch/flow,JonathanUsername/flow,nmote/flow,samwgoldman/flow,AgentME/flow,mroch/flow,JonathanUsername/flow,nmote/flow,popham/flow,jamesgpearce/flow,mroch/flow,gabelevi/flow,popham/flow,gabelevi/flow,popham/flow,facebook/flow,jamesgpearce/flow,jamesgpearce/flow,nmote/flow,nmote/flow