Fix yield example (#954)
Fix yield example (#954)

Create on an actor has to be a constructor. Aka
'new create' not 'be create'.
CausalityLtd/ponyc,boemmels/ponyc,mkfifo/ponyc,sgebbie/ponyc,boemmels/ponyc,boemmels/ponyc,mkfifo/ponyc,jupvfranco/ponyc,ponylang/ponyc,cquinn/ponyc,jupvfranco/ponyc,kulibali/ponyc,CausalityLtd/ponyc,cquinn/ponyc,Perelandric/ponyc,jemc/ponyc,jupvfranco/ponyc,Perelandric/ponyc,Theodus/ponyc,CausalityLtd/ponyc,malthe/ponyc,lukecheeseman/ponyta,mkfifo/ponyc,jemc/ponyc,boemmels/ponyc,lukecheeseman/ponyta,Theodus/ponyc,sgebbie/ponyc,sgebbie/ponyc,malthe/ponyc,Theodus/ponyc,malthe/ponyc,sgebbie/ponyc,boemmels/ponyc,ponylang/ponyc,jupvfranco/ponyc,jemc/ponyc,Praetonus/ponyc,dipinhora/ponyc,kulibali/ponyc,mkfifo/ponyc,sgebbie/ponyc,Perelandric/ponyc,kulibali/ponyc,mkfifo/ponyc,ponylang/ponyc,Perelandric/ponyc,Praetonus/ponyc,Praetonus/ponyc,dipinhora/ponyc,Theodus/ponyc,Theodus/ponyc,dipinhora/ponyc,jupvfranco/ponyc,lukecheeseman/ponyta,cquinn/ponyc,cquinn/ponyc,Praetonus/ponyc,Perelandric/ponyc,malthe/ponyc,kulibali/ponyc