Assert that Extract* baselines are syntactically valid
Assert that Extract* baselines are syntactically valid

donaldpipowitch/TypeScript,Eyas/TypeScript,SaschaNaz/TypeScript,synaptek/TypeScript,donaldpipowitch/TypeScript,alexeagle/TypeScript,basarat/TypeScript,basarat/TypeScript,microsoft/TypeScript,RyanCavanaugh/TypeScript,kitsonk/TypeScript,Microsoft/TypeScript,TukekeSoft/TypeScript,weswigham/TypeScript,RyanCavanaugh/TypeScript,basarat/TypeScript,alexeagle/TypeScript,RyanCavanaugh/TypeScript,kpreisser/TypeScript,kitsonk/TypeScript,microsoft/TypeScript,nojvek/TypeScript,SaschaNaz/TypeScript,SaschaNaz/TypeScript,kitsonk/TypeScript,microsoft/TypeScript,donaldpipowitch/TypeScript,synaptek/TypeScript,synaptek/TypeScript,weswigham/TypeScript,minestarks/TypeScript,TukekeSoft/TypeScript,Eyas/TypeScript,nojvek/TypeScript,kpreisser/TypeScript,nojvek/TypeScript,donaldpipowitch/TypeScript,kpreisser/TypeScript,SaschaNaz/TypeScript,weswigham/TypeScript,basarat/TypeScript,minestarks/TypeScript,Microsoft/TypeScript,minestarks/TypeScript,synaptek/TypeScript,Microsoft/TypeScript,Eyas/TypeScript,alexeagle/TypeScript,nojvek/TypeScript,TukekeSoft/TypeScript,Eyas/TypeScript