Expected `armadillo_version()` to equal "Medium Roast Deluxe 15.2.1".
Differences:
`actual`:   "Medium Roast Deluxe 15.2.6"
`expected`: "Medium Roast Deluxe 15.2.1"

expect_equal(armadillo_version(), "Medium Roast Deluxe 15.2.1")