View Source mix generate_tokenizer_tests (Floki v0.36.1)

It generates tests based on test files from WHATWG.

This task will take a look at tokenizer test files that are located in "./test/html5lib-tests/tokenizer" and generate modules to run those tests.

This is necessary every time the specs of HTML change, so we can keep up to date and also we can keep track of what changed.