stijn 40ad8f1666 all: Rename "sys" module to "usys".
This is consistent with the other 'micro' modules and allows implementing
additional features in Python via e.g. micropython-lib's sys.

Note this is a breaking change (not backwards compatible) for ports which
do not enable weak links, as "import sys" must now be replaced with
"import usys".
2020-09-04 00:10:24 +10:00
..

This directory doesn't contain real tests, but code snippets to detect
various interpreter features, which can't be/inconvenient to detecte by
other means. Scripts here are executed by run-tests at the beginning of
testsuite to decide what other test groups to run/exclude.