Full codepoint tests will only be run if the RUN_FULL_CODEPOINT_TESTS
environment variable is set. This is set in the CI enviroment.
The tests take too long to run locally as part of regular test driven
development.
With the exception of text_decoder.gd the code in these files follows
the original so closely that it doesn't qualify as an original work
and so there is nothing new to copyright.
Instead, the original license text is kept with a note mentioning the
port to GDScript.