add new line at the end of files when using -r
add new line at the end of files when using -r

-r replaces your test file expectation with whatever is currently being output from the server under test. This is a massive win for easy of updating tests. However it wasn't adding a new line at the end of files which was tripping up the CI.
duedil-ltd/graphql-integration-testing,duedil-ltd/graphql-integration-testing