Fix tests that expect a certain digest hash for dependent files
Fix tests that expect a certain digest hash for dependent files

This behavior changed between Sprockets 3.0.0.beta8 and 3.0.0 stable,
and this updates the tests accordingly so they are compatible with
Sprockets up to v3.5.x.

[insert I HAVE NO IDEA WHAT I'M DOING dog meme]

github/sprockets-rails