* Move the `create_function()` code into a file that's only loaded, and into a test that's only run, on PHP <= 7.2 to avoid deprecated warnings in 7.2+.
* Convert the test skipping into a failure if the GlotPress locale file cannot be downloaded.
* Ensure `test_exceptions` fails if an exception is not thrown.
* Docs improvements
See #41562, #40109
git-svn-id: https://develop.svn.wordpress.org/trunk@41730 602fd350-edb4-49c9-b593-d223f7449a82
John Blackbourn