Add a clickable link to file when already exists and not generated by roxygen2

[olivroy]

An alternative would also be to use

"Skipping {.path {path}}"

Using the approach in the cli manual

I edited the snapshot test and used transform to strip temp path

[hadley]

Why remove the snapshot test?

[olivroy]

It had a stochastic output. I could use transform to restore it, but I didn't know about it then!

[hadley]

Oooh because it's a temp file.

[olivroy]

I restored the snapshot test and fixed a bracket typo! This is ready for your review

[hadley]

Perfect, thank you!