Let's append the date to the domain in the file name, to be able
to have multiple versions for the same domain.
There is no particular rhyme or reason to the domains being used:
I just pulled a few domains that happened to be present in issues reported
on github, even though the issues were not about pretty printing.
Moe test-resolve's test data from src/resolve/test-data to
test/test-resolve/ to be consistent with test/test-{execute,path}/. This
will make it easier to make the tests relocatable.