Update logger tests to account for #684 being fixed
Update logger tests to account for #684 being fixed

We were using `var` where we wanted `let` due to issue #684.
With that being fixed, update code to what we originally intended.

dipinhora/ponyc,Theodus/ponyc,lukecheeseman/ponyta,boemmels/ponyc,jemc/ponyc,Theodus/ponyc,jupvfranco/ponyc,ponylang/ponyc,Perelandric/ponyc,boemmels/ponyc,boemmels/ponyc,lukecheeseman/ponyta,Perelandric/ponyc,dipinhora/ponyc,jupvfranco/ponyc,ryanai3/ponyc,kulibali/ponyc,ryanai3/ponyc,cquinn/ponyc,malthe/ponyc,Perelandric/ponyc,ponylang/ponyc,ponylang/ponyc,jupvfranco/ponyc,jemc/ponyc,Theodus/ponyc,Perelandric/ponyc,Praetonus/ponyc,mkfifo/ponyc,mkfifo/ponyc,boemmels/ponyc,Theodus/ponyc,ryanai3/ponyc,cquinn/ponyc,kulibali/ponyc,boemmels/ponyc,cquinn/ponyc,CausalityLtd/ponyc,sgebbie/ponyc,sgebbie/ponyc,mkfifo/ponyc,sgebbie/ponyc,CausalityLtd/ponyc,jemc/ponyc,CausalityLtd/ponyc,mkfifo/ponyc,jupvfranco/ponyc,sgebbie/ponyc,malthe/ponyc,jupvfranco/ponyc,kulibali/ponyc,doublec/ponyc,Perelandric/ponyc,doublec/ponyc,doublec/ponyc,malthe/ponyc,Praetonus/ponyc,cquinn/ponyc,dipinhora/ponyc,sgebbie/ponyc,Theodus/ponyc,mkfifo/ponyc,Praetonus/ponyc,malthe/ponyc,kulibali/ponyc,Praetonus/ponyc,lukecheeseman/ponyta