Code snippet from Lens manual does not compile

import monocle.Lens
val streetNumber = Lens[Address, Int](_.streetNumber)(n => a => a.copy(streetNumber = n))

Fails compilation with error not found: value n. I wanted to fix that but then I noticed that actually it's somehow already mentioned in lens.md file:

// REPL bug: `error: not found: value n` if I rename _streetNumber to streetNumber
import monocle.Lens
val _streetNumber = Lens[Address, Int](_.streetNumber)(n => a => a.copy(streetNumber = n))
val streetNumber = _streetNumber

But I cannot see this snippet at http://julien-truffaut.github.io/Monocle/optics/lens.html and I blame it on tut:silent:invisible. Also it's not just in REPL - I cannot compile it with scala 2.12.2.

Would be nice to this hidden code instead of current visible one. Spent at least half an hour on that, it's really confusing.

Inspect the lens.md source and the generated lens documentation at the linked page, focusing on the tut:silent:invisible snippet and the currently visible Lens example. Update the documented example so it compiles with Scala 2.12.2, then verify the generated documentation and snippet compilation.