Revert "Merge pull request #74 from trestletech/master"

This reverts commit 2ac07c1f8213ec08a4a6e252b33568ffb85d1c8d, reversing
changes made to 3a1b44abe16b757be5f794a4cba435b3b1a5ee02.
Re-roxygenise
Add positive messages to every expectation
Expectation negation