draft_generators — generate only comments?

[bpurinton]

An idea: what if draft_generators generated code all started out commented, and it was up to the students to uncomment/opt-in to what they want to use?

Perhaps that will make them feel a bit more ownership of the code/freedom to rewrite the code.

@\jelani I assume this change won't actually comment out each line in a View template, since those comments are not super easy to uncomment.

cc @raghubetina