Torchscript tutorial example is broken

[indigoviolet]

📚 Documentation

https://pytorch.org/tutorials/beginner/Intro_to_TorchScript_tutorial.html#using-scripting-to-convert-modules

The example is trying to motivate why scripting is needed, by demonstrating a missing conditional in tracing, but the actual output code is identical between the tracing and scripting cases -- perhaps we need to show the output of compiling MyDecisionGate instead of MyCell?

cc @gmagogsfm

[SplitInfinity]

Already fixed, waiting for review: pytorch/tutorials#866