Add in newline

Author: Huddie

lib/AST/DeclContext.cpp

@@ -1385,4 +1385,4 @@ bool DeclContext::isAlwaysAvailableConformanceContext() const {
       AvailabilityContext::forDeploymentTarget(ctx);
 
   return deploymentTarget.isContainedIn(conformanceAvailability);
-}
+}